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Border Collie

Border Collie
Photo: Wikimedia Commons / CC BY-SA 3.0 · Wikimedia

157 Border Collies in the atlas. Every number on this page has a source.

Population-genetic snapshot of Border Collies in the Sniff Atlas, source-graded Mendelian carrier frequencies from Donner 2023, and nutrition guidance tied to the genetic findings above.

Also known as Scottish Sheepdog.

See in the atlas → From CanVAS
The plain version

Border Collies have a moderately diverse genetic background, which means there’s a good mix of genes within the breed. They typically weigh around 39 lb and live about 12 and a half years. Border Collies share some traits with breeds like the Australian Shepherd and Welsh Corgis. Some dogs in this breed may carry genes linked to eye issues and heart conditions, which come from their overall gene pool—not a prediction for any one dog—so it’s a good idea to talk with your vet or consider genetic testing.

What the atlas says about Border Collie

In the atlas, the Border Collie clusters consistently as Border Collie (100% of the 157 dogs here). Genetic diversity is high (mean heterozygosity 0.3201), reflecting either a mixed-breed cluster or breeds with broad genetic backgrounds. At the trait loci, HMGA2 runs lower than average (10% here vs 56%); MC1R runs higher than the atlas average (100% here vs 62%). This is a densely populated region, many genetically similar dogs are sampled.

Mean heterozygosity is 0.320, notably high, indicates broad genetic background.

Genetic dimensions · CanVAS atlas

What the genome says about Border Collie

Computed from the 18,477 research dogs in the Atlas.

Dogs in the Atlas
157Founders
63 from Cairns, 52 from Hayward2016, 15 from Shannon
Genetic diversity
0.32Moderate
Mean heterozygosity across the breed. Ranks 70th most genetically tight of 107 ranked breeds.
What does genetic diversity mean?

How varied a breed's gene pool is — the share of gene spots where a typical dog of the breed carries two different versions rather than two identical ones.

How to read it: Higher = more diverse. Among well-sampled breeds it ranges roughly 0.22 (least diverse) to 0.33 (most diverse).

Diversity is a strength, not a verdict on any individual dog. Lower diversity means it's worth paying attention to recessive-risk testing — not that a dog is doomed.

Cluster structure
Splits into two genetic sub-populations
Intra-breed RMS distance: 34.19 · likely working/show-line, regional, or kennel lineage split.
What does within-breed variation mean?

How much individual dogs within the breed differ from each other genetically.

How to read it: Higher = more internal variety among individuals of the breed.

Sensitive to how many dogs of the breed we've sampled.

Related breeds
In the Herding group
Explore the full lineage map →
VBO foundation stock (breeding records) · AKC breed group
Relatedness is documented lineage + kennel family. Genetic-ancestry distance measures diversity, not kinship, so it isn't used here.
How long they live
13.1years (life expectancy)
95% CI 13–13.2 · VetCompass, McMillan 2024, n=12,917. source
What does typical lifespan mean?

The median age dogs of the breed tend to reach.

How to read it: Higher = longer-lived. Compare to longevity-for-size to see whether it's just a size effect.

Drawn from population lifespan records; individual dogs vary widely with care, genetics, and luck.

Trait genetics
Allele frequencies at named morphology loci

Frequency of the alternate allele in this breed at each locus's representative SNP.

Body size
IGF175%
HMGA210%
SMAD270%
LCORL99%
STC293%
ADAMTS1767%
Leg length
FGF4·CFA1875%
FGF4·CFA1295%
Coat
RSPO240%
FGF585%
KRT7181%
MC1R100%
Ear set
MSRB390%
Skull shape
BMP359%
SMOC278%
n = 157 dogs · high confidence · CanVAS (Brundage 2026) · Sniff Atlas
Names & origins

Other names

The Border Collie is also recorded as Scottish Sheepdog.

Identified as Border Collie (VBO:0200193) in the Vertebrate Breed Ontology (Mullen et al. 2025, CC-BY 4.0) · registry IDs FCI 297 · iDog 43 · VeNom 13883.

Temperament

What Border Collies tend toward

Tendencies from owner surveys of purebred Border Collies — a leaning across the breed, not a prediction for any one dog. A bar’s strength shows how much of that behavior breed actually explains: for most it’s faint, because the rest is your dog, their training, and the life you give them.

Biddabilitybreed ~18%
biddableindependent
Toy-directed Motor Patternsbreed ~18%
toy-directednot toy-directed
Environmental Engagementbreed ~9%
high engagementlow engagement
Proximity Seekingbreed ~13%
affectionatealoof
Dog Sociabilitybreed ~8%
less sociablehighly sociable
Human Sociabilitybreed ~11%
less sociablehighly sociable
Arousal Levelbreed ~8%
arousedcomposed
Agonistic Thresholdbreed ~9%
assertivediffident
n = 94 dogs · Morrill et al. 2022, Science, Darwin's Ark (CC0)
Owner-reported purebreds; each factor n ≥ 25. "Breed ~%" is the share of this behavior explained by breed.
What you see when you look at a Border Collie

What does the genome say about how a Border Collie looks?

Border Collies look the way they do because of a small set of fixed and near-fixed morphology genes that, taken together, define the visible breed. Each translation below pairs the gene with the trait an owner actually sees, the breed's allele frequency at that locus, and a one-clause causal phrase.

Where the breed-defining genes act, mapped on a generic dog-body key — and how fixed each marker is in the Border Collie. The figure is the most-settled marker we read in that region; the full per-locus panel is below. (The silhouette is a shared anatomical guide, not this breed's outline.)

Body sizeLCORL · 99%Skull shapeSMOC2 · 78%EarsMSRB3 · 90%Leg lengthFGF4 CFA12 · 95%Coat & colorMC1R · 100%
CanVAS trait-locus panel (Brundage 2026)
15 morphology markers read across 5 regions. Allele frequency = how fixed a marker is in this breed, not whether your dog carries it.

Size and build

IGF1 sits at 75% for the small-body allele. IGF1 is the gene that sets dog body size from Chihuahua to Great Dane. Intermediate frequencies typically keep a breed in the mid-sized range rather than tipping toward the larger working forms.

IGF1what this gene does

IGF1 is a gene that plays a key role in determining a dog's body size. It influences how much a dog grows, affecting overall stature.

For your dog: Knowing about IGF1 gives you insight into your dog's size traits, but it’s just one part of the bigger picture when it comes to their health and care.

Full IGF1 gene page →

HMGA2 is at 10%, leaving most of the size signal to other loci in the panel.

HMGA2what this gene does

HMGA2 is a gene that influences body size in dogs, helping determine how big or small a dog grows.

For your dog: Knowing about HMGA2 helps you appreciate the genetic factors behind your dog's size, but it doesn't signal any health issues.

Full HMGA2 gene page →

SMAD2 sits at 70% at the chromosome-7 height locus.

SMAD2what this gene does

SMAD2 is a gene involved in regulating body size by influencing how cells grow and develop.

For your dog: Knowing about SMAD2 helps understand your dog's size traits but isn't linked to health issues; no immediate action needed.

Full SMAD2 gene page →

LCORL is near-fixed at 99%, the NCAPG/LCORL height locus that is one of the strongest single contributors to canine body size.

LCORLwhat this gene does

LCORL is a gene that influences body size in dogs. It helps determine how big or small a dog might grow.

For your dog: Knowing about LCORL helps you appreciate the genetic factors behind your dog's size, but it’s just one piece of the bigger picture when it comes to health and care.

Full LCORL gene page →

STC2 is near-fixed at 93%, modulating growth-axis signaling toward the breed's body-size set point.

ADAMTS17 sits at 67%. ADAMTS17 is a body-size locus also linked to lens disorders.

ADAMTS17what this gene does

ADAMTS17 is a gene that influences body size and also plays a role in certain eye conditions. It affects the structure of tissues in the eye and elsewhere in the body.

For your dog: If your dog belongs to a breed known to carry ADAMTS17 variants, it’s worth discussing genetic testing and eye exams with your vet to stay ahead of potential issues.

Full ADAMTS17 gene page →

Leg length

The FGF4 retrogene on chromosome 18 sits at 75%. This is the leg-length variant. The intermediate frequency means some dogs in this breed carry the short-legged allele and some do not.

The FGF4 retrogene on chromosome 12 is near-fixed at 95%, the chondrodystrophic variant associated with intervertebral disc disease risk in breeds that carry it.

Coat type, length, and color

RSPO2 sits at 40% for the furnishings variant. Furnishings (the eyebrow-and-mustache pattern seen in Schnauzers and Wheaten Terriers) vary across the population at this intermediate frequency, and visible expression depends on the specific allele combination each dog carries.

RSPO2what this gene does

RSPO2 influences the texture and appearance of a dog's coat, particularly the presence of 'furnishings' like mustaches and eyebrows. It helps determine whether a dog has that distinctive wiry or textured look.

For your dog: If your dog has those wiry eyebrows or a mustache, RSPO2 is part of the reason—no health worries, just a coat feature worth knowing about.

Full RSPO2 gene page →

FGF5 is at 85% for the long-coat variant, which is why the breed's coat sits where it does on the long end of the dog coat-length spectrum.

FGF5what this gene does

FGF5 is a gene that influences the length of a dog's coat. It acts like a natural switch, telling hair follicles when to stop growing longer fur.

For your dog: If your dog has a notably long or short coat, FGF5 is likely part of the reason—no action needed, but it’s a neat genetic detail to know.

Full FGF5 gene page →

KRT71 sits at 81% for the wavy/curly variant. Coat curl varies across individuals at this intermediate frequency, and visible expression is also influenced by modifier loci.

KRT71what this gene does

KRT71 is a gene that influences the curliness of a dog's coat. It helps determine whether a dog's fur is straight or has a distinctive curl.

For your dog: If your dog has a curly coat, KRT71 is likely part of the reason; it’s a natural variation, not a health concern.

Full KRT71 gene page →

MC1R is at 100% at the representative SNP. MC1R controls the switch between red-to-gold and black-to-brown pigment, with the e/e homozygous genotype producing the gold-to-red spectrum by blocking eumelanin (black and brown pigment).

MC1Rwhat this gene does

MC1R is a gene that influences coat color in dogs, affecting how pigments are produced in the fur.

For your dog: Knowing about MC1R gives insight into your dog's coat color but doesn't relate to health issues.

Full MC1R gene page →

Ears

MSRB3 is at 90% for the drop-ear allele, the genetic basis of the breed's signature dropped ear set.

MSRB3what this gene does

MSRB3 is a gene involved in the development of ear shape and structure in dogs.

For your dog: Understanding MSRB3 helps explain why your dog's ears look the way they do, but it isn't linked to any health issues.

Full MSRB3 gene page →

Skull shape

BMP3 sits at 59%, contributing to the breed's moderate, mesaticephalic head shape rather than the extreme brachycephalic form.

BMP3what this gene does

BMP3 is a gene that influences the shape of a dog's skull, particularly contributing to a shorter, broader head shape known as brachycephaly.

For your dog: If your dog has a broad, short skull, it's worth discussing with your vet how this might impact their health, even though BMP3 isn't directly tied to illness.

Full BMP3 gene page →

SMOC2 sits at 78%, contributing to the breed's moderate head shape.

SMOC2what this gene does

SMOC2 influences the shape of a dog's skull, particularly affecting how flat or short the face appears.

For your dog: If your dog has a short nose, it's worth discussing with your vet how this trait might impact their health over time.

Full SMOC2 gene page →
Mendelian-disease genetics

What genetic diseases do Border Collies carry?

From a panel of 250 Mendelian-disease variants screened in 1,054,293 dogs (Donner et al. 2023), Border Collies carry 29 of them at observable frequency. Carrier frequency is not clinical risk. Most recessive variants require two copies for disease expression; many dominant variants show incomplete penetrance. Read this as a population fingerprint of what's in the gene pool, not a per-dog prediction.

Collie Eye Anomaly (CEA)
Autosomal recessive
moderate 11.1%
n = 6,714 dogs · 1 variant tested · OMIA:000218-9615 · omia.org →
NHEJ1what this gene does

NHEJ1 is a gene involved in repairing breaks in DNA, helping maintain the integrity of genetic information in cells.

For your dog: If your dog belongs to one of the breeds known to carry this gene variant, it's worth discussing testing with your vet to understand any potential eye health risks.

Dilated Cardiomyopathy risk factor (Discovered in the Doberman Pinscher; PDK4-related)
Autosomal dominant (Incomplete penetrance)
moderate 1.0%
n = 6,714 dogs · 2 variants tested · OMIA:000162-9615 · omia.org →
PDK4what this gene does

PDK4 helps regulate how cells use energy, especially in the heart muscle.

For your dog: If your dog is one of the breeds known to carry this gene, it’s worth discussing heart health with your vet, but being a carrier doesn’t mean your dog will develop disease.

Intestinal Cobalamin Malabsorption (Discovered in the Border Collie; CUBN-related)
Autosomal recessive
low 3.6%
n = 6,714 dogs · 3 variants tested · OMIA:001786-9615 · omia.org →
CUBNwhat this gene does

The CUBN gene helps the body absorb vitamin B12 from the intestines, which is essential for energy and nerve function.

For your dog: If your dog’s breed is on the list, it’s worth discussing CUBN-related risks with your vet to keep an eye on their vitamin B12 levels.

Trapped Neutrophil Syndrome (TNS)
Autosomal recessive
low 2.8%
n = 6,714 dogs · 1 variant tested · OMIA:001428-9615 · omia.org →
Dental Hypomineralisation (Discovered in the Border Collie)
Autosomal recessive
low 1.1%
n = 6,706 dogs · 1 variant tested · OMIA:002015-9615 · omia.org →
FAM20Cwhat this gene does

FAM20C is a gene that plays a key role in the mineralization of teeth, helping them develop properly and stay strong.

For your dog: If your dog is from one of these breeds, it's worth mentioning FAM20C to your vet when discussing dental care, but being a carrier doesn't mean your dog will have problems.

Sensory Neuropathy (Discovered in the Border Collie)
Autosomal recessive
low 0.72%
n = 6,714 dogs · 1 variant tested · OMIA:002032-9615 · omia.org →
MDR1 (Multidrug Resistance 1) Medication Sensitivity
Autosomal dominant
low 0.46%
n = 6,712 dogs · 1 variant tested · OMIA:001402-9615 · omia.org →
ABCB1what this gene does

ABCB1 is a gene that helps control how certain drugs are processed and cleared from a dog's body.

For your dog: If your dog is from a breed that carries this gene variant, ask your vet about medication sensitivities before giving any new drugs.

Degenerative Myelopathy (DM)
Autosomal recessive (Incomplete penetrance)
low 0.35%
n = 6,714 dogs · 1 variant tested · OMIA:000263-9615 · omia.org →
SOD1what this gene does

SOD1 is a gene that helps protect cells from damage caused by harmful molecules called free radicals.

For your dog: If your dog is a carrier of SOD1 variants, it's worth discussing with your vet, but remember carrier status doesn't mean your dog will get the disease.

Exercise-Induced Collapse (EIC)
Autosomal recessive (Incomplete penetrance)
low 0.22%
n = 6,713 dogs · 1 variant tested · OMIA:001466-9615 · omia.org →
DNM1what this gene does

DNM1 is a gene that helps nerve cells communicate properly by managing how they send signals during muscle activity.

For your dog: If your dog belongs to one of the breeds known to carry this gene variant, it's worth discussing EIC with your vet, especially if your dog is very active or shows signs of weakness during exercise.

Myotonia Congenita (Discovered in the Australian Cattle Dog)
Autosomal recessive
low 0.22%
n = 6,714 dogs · 3 variants tested · OMIA:000698-9615 · omia.org →
Von Willebrand's Disease, Type 1 (vWD 1)
Autosomal recessive
low 0.12%
n = 6,714 dogs · 1 variant tested · OMIA:001057-9615 · omia.org →
Progressive Rod-Cone Degeneration (prcd-PRA)
Autosomal recessive
low 0.10%
n = 6,704 dogs · 1 variant tested · OMIA:001298-9615 · omia.org →
PRCDwhat this gene does

PRCD is a gene involved in the health of a dog's retina, the part of the eye that detects light and helps with vision.

For your dog: If your dog belongs to a breed known to carry PRCD changes, it's worth discussing eye health and potential genetic testing with your vet.

Ichthyosis (Discovered in the Golden Retriever)
Autosomal recessive
low <0.1%
n = 6,714 dogs · 1 variant tested · OMIA:001588-9615 · omia.org →
PNPLA1what this gene does

PNPLA1 is a gene involved in maintaining the skin's barrier by helping produce essential fats that keep the skin healthy and hydrated.

For your dog: If your dog is from a breed known to carry PNPLA1 variants and shows persistent dry, flaky skin, it's worth discussing with your vet to understand if genetics might be playing a role.

Cystinuria Type I-A (SLC3A1 p.I192V)
Autosomal recessive
low <0.1%
n = 6,714 dogs · 3 variants tested · OMIA:000256-9615 · omia.org →
SLC3A1what this gene does

SLC3A1 is a gene that helps transport certain amino acids in the kidneys. It plays a key role in preventing the buildup of cystine, which can form stones.

For your dog: If your dog is from a breed known to carry SLC3A1 variants, it’s worth discussing cystinuria risks with your vet, especially if urinary issues arise.

Neuronal Ceroid Lipofuscinosis 5 (Discovered in the Border Collie; NCL5)
Autosomal recessive
low <0.1%
n = 6,714 dogs · 1 variant tested · OMIA:001482-9615 · omia.org →
Pituitary-Dependent Hyperadrenocorticism (Discovered in Poodles)
Autosomal dominant
low <0.1%
n = 6,714 dogs · 1 variant tested · OMIA:000247-9615 · omia.org →
Chondrodystrophy and Intervertebral Disc Disease Risk (CDDY)
Autosomal dominant
low <0.1%
n = 6,692 dogs · 1 variant tested · OMIA:000157-9615 · omia.org →
FGF4what this gene does

FGF4 influences leg length by affecting bone growth, leading to shorter legs in certain breeds.

For your dog: If your dog is from a breed known to carry this gene, it's worth discussing spinal health with your vet, but being a carrier doesn’t guarantee problems.

Cone-Rod Dystrophy (cord1-PRA/crd4)
Autosomal recessive (Incomplete penetrance)
low <0.1%
n = 6,703 dogs · 1 variant tested · OMIA:001432-9615 · omia.org →
RPGRIP1what this gene does

RPGRIP1 is a gene involved in the function of photoreceptor cells in the eye, which help dogs see in different light conditions.

For your dog: If your dog belongs to a breed known to carry RPGRIP1 mutations, it’s worth discussing with your vet to understand the risks and monitor eye health.

Hyperuricosuria (HUU)
Autosomal recessive
low <0.1%
n = 6,714 dogs · 1 variant tested · OMIA:001033-9615 · omia.org →
SLC2A9what this gene does

SLC2A9 is a gene that helps regulate uric acid levels in a dog's body. It plays a role in how the kidneys handle this substance.

For your dog: If your dog is one of the breeds known to carry this gene variant, it’s worth discussing with your vet to understand any potential urinary health concerns.

Bald Thigh Syndrome (Discovered in Sighthounds)
Autosomal recessive
low <0.1%
n = 2,115 dogs · 1 variant tested · OMIA:002168-9615 · omia.org →
IGFBP5what this gene does

IGFBP5 is a gene that helps regulate growth factors involved in tissue development and repair.

For your dog: If you have a sighthound, it’s worth mentioning IGFBP5-related risks to your vet, but being a carrier doesn’t mean your dog will develop the syndrome.

Plus 9 more at lower frequency. Full table available via the API when shipped.
Source: Donner J et al. 2023. Genetic prevalence and clinical relevance of canine Mendelian disease variants in over one million dogs. PLOS Genetics 19(2):e1010651 · Evidence: Limited (DTC ascertainment, tag-SNP proxy) · Confounding MEDIUM · License CC-BY-4.0 · Phene IDs from OMIA (Sydney School of Veterinary Science, The University of Sydney; DOI 10.25910/2AMR-PV70).
Sample size in this breed: 6,714 dogs from the Donner 2023 cohort.
Comparative oncology

Border Collies are a natural model for human cancer.

Some cancers appear in Border Collies and in people driven by the same somatically-altered genes, cohort by cohort and cited on both sides. That makes this breed part of how we understand, and one day treat, the human disease. This is not a prediction about your dog, it is a window into the biology we share.

The dog and human lymphoma model →

Which Mendelian variants matter most for Border Collies?

The Mendelian-disease table above lists variants screened in 6,714 Border Collies (Donner 2023). Twenty-nine variants appear at observable carrier frequency; twelve are highlighted here. The first is consequential by frequency; the others matter less by carrier count but remain testable and relevant to breeding decisions.

Collie Eye Anomaly (CEA)

Collie Eye Anomaly in Border Collies is an autosomal-recessive developmental eye condition caused by a variant in the NHEJ1 gene. Affected dogs have underdeveloped retinal and choroidal tissue that ranges from asymptomatic to vision-limiting. 11.1% of Border Collies in the Donner cohort carry one copy (n=6,714). That means roughly 1 in 9 Border Collies in the tested population carries one copy.

Testing is widely available through commercial DNA labs and breed-specific panels. The Border Collie Society of America recommends CEA screening for breeding stock, either through genetic testing or ophthalmologic examination by a board-certified veterinary ophthalmologist.

Dilated cardiomyopathy risk factor in Border Collies is an autosomal-dominant variant with incomplete penetrance, discovered in Doberman Pinschers and identified in Border Collies at 1.0% carrier frequency (n=6,714). The variant is in the TTN gene and predisposes to dilated cardiomyopathy, though not every carrier develops clinical disease. Testing exists but is less widely available than CEA screening.

Intestinal Cobalamin Malabsorption in Border Collies is an autosomal-recessive disorder of vitamin B12 absorption caused by a variant in CUBN. Affected dogs fail to absorb dietary cobalamin and develop neurologic signs and anemia if untreated. The variant is present in 3.6% of Border Collies as carriers (n=6,714). Only 1 of 5 at-risk dogs in the Donner S4 cohort showed phenotype confirmation, suggesting incomplete penetrance (max 20%).

The condition is manageable with lifelong cobalamin supplementation, usually via monthly injections. Testing is available.

Trapped Neutrophil Syndrome (TNS)

Trapped Neutrophil Syndrome in Border Collies is an autosomal-recessive immune deficiency caused by a variant in the VPS13B gene. Affected dogs cannot release mature neutrophils from bone marrow and develop recurrent infections and poor wound healing. The carrier frequency is 2.8% (n=6,714), and penetrance is high: 2 of 2 at-risk dogs in the Donner S4 cohort showed confirmed phenotypes (max 100%).

Affected dogs are managed supportively but have a poor prognosis. Testing is available.

Dental Hypomineralisation

Dental Hypomineralisation in Border Collies is an autosomal-recessive enamel defect causing weak, discolored teeth prone to decay and fracture. The carrier frequency is 1.1% of the 6,706 Border Collies tested (Donner 2023). It is cosmetic and functional; affected dogs require heightened dental care.

Sensory Neuropathy

Sensory Neuropathy in Border Collies is an autosomal-recessive peripheral nerve disorder discovered in the breed, causing progressive loss of pain sensation and proprioception. The carrier frequency is 0.72% (n=6,714). Affected dogs develop skin lesions and gait abnormalities as the condition progresses. No curative treatment exists.

How should I test my Border Collie?

A breed-specific panel from a CLIA-accredited lab is the high-yield path for breeding stock. The minimum useful set is CEA, the TTN cardiac risk variant, Cobalamin Malabsorption, TNS, and MDR1. Additional testing for Dental Hypomineralisation and Sensory Neuropathy is available if those conditions are of concern within your breeding program.

What should I feed a Border Collie?

Border Collies are working dogs with metabolisms tuned for full-day stockwork. A pet Border Collie eating a maintenance kibble in a suburban yard is being fed for a job they are not doing.

The breed carries no breed-defining genetic vulnerability to diet-associated disease comparable to the dilated-cardiomyopathy signal in Goldens or the gastric dilatation-volvulus risk in deep-chested giants. That means the nutrition priority for Border Collies is matching caloric intake to actual activity level, not feeding around a heritable cardiac condition.

Activity-matched feeding prevents the single most common Border Collie health failure: obesity. A working Border Collie on a 12-hour stockwork day burns roughly 4,000 to 5,500 kilocalories daily (NRC 2006, Nutrient Requirements of Dogs and Cats, p. 352). A pet Border Collie in a suburban home burns roughly 1,400 to 1,800 kilocalories (NRC 2006). Many owners default to the working-dog feeding protocol out of breed tradition, which leads to weight gain and joint stress. The food label’s caloric density is the starting number; the dog’s actual waistline and energy level are the correctives. Excess weight increases joint loading and is an established risk factor for hip dysplasia across breeds (Smith et al. 2006, JAVMA 229:690-693). This breed’s high activity intensity makes weight management especially relevant.

Puppy growth in Border Collies is moderate and straightforward. Unlike giant breeds, Border Collies do not require special calcium-to-phosphorus ratios or growth-limiting protocols. Standard large-breed puppy formulations (with a calcium-to-phosphorus ratio between 1.1:1 and 2:1, per NRC 2006) are appropriate. The breed grows to adult size by 14 to 16 months. Overfeeding puppies does not confer any benefit and accelerates joint-related growth orthopedics problems.

Grain-inclusive or grain-free: this breed has no breed-specific sensitivity. The FDA’s 2018 dilated-cardiomyopathy advisory flagged Goldens, Pit Bulls, and other large breeds but did not single out Border Collies. The evidence base for grain-free diets as a category in Border Collies remains thin. Standard commercial formulations with named protein sources and documented feeding trials are the reliable default.

What we don’t know

The Collie Eye Anomaly variant is common across related herding breeds including the Australian Shepherd, and is present at 11.1% in Border Collies. The honest question is whether CEA carrier status affects breeding decisions meaningfully, given that homozygotes show a wide range of phenotypic severity and many carriers remain fully sighted. The breed-club health position on CEA screening and reporting would be the most current guidance.

The TTN-related dilated-cardiomyopathy signal in Border Collies is rare (1.0% carrier frequency) and comes from discovery work in Dobermans. We do not yet have breed-specific penetrance data in working Border Collies, so the clinical significance for this breed remains uncertain.

The published environmental analyses for common Border Collie conditions (hip dysplasia, behavioral problems, seizure-like events in high-drive dogs) have come back mostly null. Genetic predisposition is likely but remains unmapped. The breed’s functional line versus show line divergence may matter, but no controlled study has isolated environmental versus genetic contribution.

Frequently asked questions about Border Collies

What is the most common genetic disease in Border Collies? Collie Eye Anomaly, at 11.1% carrier frequency (Donner 2023, n=6,714). Most carriers remain fully sighted; the condition ranges from asymptomatic to vision-limiting.

Are Border Collies prone to hip dysplasia? The Orthopedic Foundation for Animals reports hip dysplasia prevalence for Border Collies in their public breed statistics database (ofa.org/diseases/hip-dysplasia/statistics/). This is lower than many large breeds. Weight management and controlled puppy growth minimize risk.

How long do Border Collies live? The atlas median lifespan for Border Collies is 12.6 years. Individual dogs vary widely depending on genetic background, activity level, and health management.

Should I do a DNA test on my Border Collie? For breeding stock, yes. CEA testing is the highest priority. The TTN cardiac variant, Cobalamin Malabsorption, and TNS screening are also available and relevant to breeding decisions.

What is the best diet for a Border Collie? Match caloric intake to the dog’s actual activity level, not breed stereotypes. A working Border Collie and a suburban pet have vastly different caloric needs. Large-breed adult formulations with named protein sources and documented feeding trials are standard. Grain-inclusive or grain-free diets are both acceptable; the breed has no breed-specific grain sensitivity.

Are Border Collies good with children? Border Collies have strong herding and chase drives and can nip at moving targets, including children. They require early socialization and training. They are best suited to active families who can channel their working instinct into structured activity.

What kind of exercise do Border Collies need? Border Collies are high-drive working dogs and need 2+ hours of structured activity daily. Mental stimulation (puzzle games, herding, agility) matters as much as physical exercise. Bored Border Collies develop behavioral problems and destructiveness.

Can Border Collies tolerate medication sensitivity? Yes, but with caution. The MDR1 variant is present in 0.46% of the breed (n=6,712). The MDR1 variant follows autosomal-dominant inheritance, so even one copy can cause sensitivity to ivermectin, abamectin, and some other drugs. Inform your veterinarian if your dog carries the variant.

A gift to human medicine

Border Collies are a natural model for human disease

Because the same genes cause the same conditions across species, the inherited conditions documented in Border Collies help researchers understand, and work toward treating, the human diseases they model. This is the dog advancing human medicine. The breed models the human disease; it does not have it, and this is not a prediction for your dog.

Human equivalents via OMIA → Mondo / OMIM. Model-of, not identity.
Documented in OMIA

Every condition recorded in the Border Collie

Beyond the testable carriers above, OMIA's literature catalogue records 30 genetic conditions in the Border Collie, 24 of which have a known human equivalent. This is the documented landscape across all Border Collies ever studied, not a prediction for any one dog.

Plus 12 more conditions recorded in the Border Collie in OMIA.

Online Mendelian Inheritance in Animals (OMIA); Nicholas, Tammen & Sydney Informatics Hub, DOI 10.25910/2AMR-PV70
Documented in the breed's literature is not carrier status and not a forecast for an individual dog. Human equivalents are mapped via Mondo/OMIM. Carrier frequencies (above) are the separately-measured testable subset (Donner 2023).
The data behind this page

Where every number on this page came from.

This page draws on three primary data sources. Carrier frequencies for the Mendelian section come from Donner et al. 2023 (CC-BY-4.0). We grade these data at evidence Limited because the cohort is a direct-to-consumer ascertainment, which biases toward owners who chose to test their dogs. The panel also uses tag-SNP proxies for some variants rather than direct causal-variant assays. Limited is a study-design grade, not a quality grade: the Donner cohort is the largest open canine-genotype dataset in existence and we are grateful for it. We rate the confounding MEDIUM.

Population-genetic dimensions (heterozygosity, intra-breed PCA distance, nearest neighbors, trait-locus frequencies) come from CanVAS (Brundage 2026), harmonized through the Sniff Atlas. The exact release date and verification commit are pinned at the bottom of the page so a researcher can trace a number back to a specific snapshot. The disease-gene-variant graph comes from OMIA (Online Mendelian Inheritance in Animals; Nicholas, Tammen, and the Sydney Informatics Hub at the Sydney School of Veterinary Science, The University of Sydney; retrieved April 2026, DOI 10.25910/2AMR-PV70).

What this page does not yet have. Inheritance modes and per-disease penetrance evidence from Donner 2023 are now in the structured data for every variant the panel covers. Mondo, OMIM, Ensembl, and HGNC cross-references on gene pages remain pending, they arrive in December 2026 alongside the imputed 9.67M-variant CanVAS dataset via the OMIA SQL dump absorption. Until then, gene IDs carry NCBI Gene and OMIA phene URLs only; the wider human-homolog and disease-ontology cross-reference set fills in with that release.

How to cite this page. The computed dimensions on this page are derived from the open Sniff Atlas v1.0.1 (Gehring 2026, doi:10.5281/zenodo.20566358, CC-BY 4.0). Full citation formats including BibTeX, RIS, and CITATION.cff at sniff.world/cite.

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References
  1. Donner J, Freyer J, Davison S, Anderson H, Blades M, Honkanen L, et al. (2023). Genetic prevalence and clinical relevance of canine Mendelian disease variants in over one million dogs. PLOS Genetics 19(2):e1010651. doi:10.1371/journal.pgen.1010651
  2. Brundage J, et al. (2026). CanVAS: a harmonized canine variant atlas. bioRxiv. doi:10.64898/2026.04.13.718238
  3. Nicholas, F.W., Tammen, I., & Sydney Informatics Hub. (2026). Online Mendelian Inheritance in Animals (OMIA) [dataset]. The University of Sydney. https://omia.org. doi:10.25910/2AMR-PV70 (retrieved April 2026).
Last updated
Sources: CanVAS (Brundage 2026) · Donner 2023 · OMIA