EN Gastroenteric Fiber Balance Dry Dog Food, 25-lb bag
Graded by The Sniff System
Purina Pro Plan Veterinary Diets EN Gastroenteric Fiber Balance Dry Dog Food is a veterinary diet dry food with a plant-protein-dominated formula, featuring whole grain corn as the first ingredient.
This formula includes quality carbohydrate sources that provide fermentable fiber, which can be beneficial for digestive health. It also uses quality fat sources, including named animal fat and marine oil, which provides EPA and DHA. The product has AAFCO feeding trial substantiation, which is a strong indicator of nutritional adequacy.
The formula is plant-protein-dominated, with whole grain corn as the first ingredient. It also contains menadione, a synthetic vitamin K3 that is banned in human supplements due to toxicity concerns, though it's permitted in pet food.
Good fit for dogs needing veterinary gastrointestinal support. Less ideal if you prefer a meat-first formula or want to avoid synthetic vitamin K.
Summary written by The Sniff System from the data above. Same rubric, same drivers, expressed in English.
Strong fit for adult Labrador Retrievers and similar active sporting breeds navigating weight management. At 338 kcal/cup this formula runs on the lean side, with crude fiber at 10% (above the catalog median, supports satiety). The landmark 14-year Purina Lifespan Study on 48 Labrador Retrievers demonstrated that dogs fed 25% fewer calories lived a median of 1.8 years longer and delayed the onset of chronic diseases. The 2014 AAHA Weight Management Guidelines define overweight as a Body Condition Score (BCS) of 6-7 on a 9-point scale. A score of 8 or 9 indicates obesity, representing 20-30% and >30% above ideal body weight, respectively (Brooks et al., 2014) .
Looking at this for adult Labrador Retrievers or Labrador Retrievers with weight management ? We are building dedicated pages for these combinations.
Auto-matched from this product's measurements (ingredients, life stage, calorie density) to a breed archetype. Not a substitute for vet input on your specific dog.
Research informing this analysis
MethodologyThe Sniff System grades this product against 3 cited studies relevant to its profile. Each link opens the original source.
- Brooks et al., 2014diagnostic · protocol · satiety· cited in 5 claims
- APOP, 2023prevalence
- Raffan et al., 2016genetics
Every claim on Sniff traces to a source. If you find a citation that's wrong, outdated, or misapplied, tell us.
Sniff scored this formula 45/100, landing in C-tier (acceptable-with-notes). The biggest contributor was carbohydrate quality (+15 points): Quality carbohydrate sources with fermentable fiber. The biggest detractor was protein quality (-22 points): Plant-protein-dominated formula. whole grain corn as the #1 ingredient.
Quality carbohydrate sources with fermentable fiber.
Quality fat sources: named fat with marine oil (EPA and DHA source).
AAFCO feeding trial substantiation for not stated.
Plant-protein-dominated formula. whole grain corn as the #1 ingredient.
Contains menadione. Banned for human OTC use but tolerated at AAFCO-permitted levels in pet food. The only AAFCO-permitted vitamin K source..
- Bottom 3% for protein quality in Purina Pro Plan Veterinary Diets's lineup (3.2/27)
- Top 10% for crude fiber in grain-inclusive dry kibbles (11.4% DMB)
- Bottom 10% for overall Sniff Score in grain-inclusive dry kibbles (45/100)
Computed against the rest of our catalog. Percentiles refresh on each catalog update.
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Controversial ingredients · 1
- menadioneSynthetic vitamin K3. Banned in human supplements due to toxicity concerns at high doses. Permitted in pet food but premium brands use natural vitamin K alternatives.
Every flagged ingredient has a published basis (confirmed harm / regulatory action / precautionary). See methodology →
Read why each ingredient is good or bad for dogs.
- 1grainwhole grain corn
Whole corn with the kernel intact. Decent fiber and B vitamins, though it can crowd out meat in cheaper recipes.
Position 1 grain: primary carbohydrate base. This is a grain-inclusive formula with whole grain corn as the dominant carb.
- 2fiberdried beet pulp
Soluble fiber from sugar-beet processing. Sometimes treated as a filler, but it's actually one of the better fiber sources in kibble. See why →
Position 2: functional fiber for digestion or satiety.
- 3protein animalpoultry by-product meal
Unnamed poultry. The mix can include any combination of chicken, turkey, or other birds, with no traceability. Named by-product meals are fine. This one isn't.
Position 3: significant protein contributor. Adds amino-acid diversity to the top of the deck.
- 4corn protein meal
Concentrated corn protein. Similar in role to corn gluten meal, pads the protein number on the label without matching meat amino acids.
Position 4: supporting grain. Smaller contribution to the carb deck.
- 5grainbarley
Whole grain with a low glycemic profile and some soluble fiber. Easy on blood sugar.
Position 5: supporting grain. Smaller contribution to the carb deck.
- 6animal fat preserved with mixed-tocopherols
Position 6: secondary fat. Often where marine oils sit when present alongside a primary land-animal fat.
- 7fiberpea fiber
Insoluble fiber from peas. Doesn't carry the protein-inflation concern of pea protein. Mostly there for stool quality.
Position 7. Moderate inclusion. Contributes carbohydrate and some plant protein.
- 8glycerin
Humectant used in soft-moist foods to keep them chewy. Safe in moderation but a signal of a processed semi-moist product.
- 9othernatural flavor
Legal term for animal-derived flavoring, usually hydrolyzed liver or broth. Adds taste, says nothing about quality.
- 10mono and dicalcium phosphate
Source of calcium and phosphorus. Standard inclusion in complete dog foods.
- 11wheat bran
Position 11: minor grain inclusion.
- 12dried whey
- 13mineralpotassium chloride
Required mineral. Sometimes used as a salt substitute. Standard inclusion in complete diets.
- 14mineralsalt
Sodium chloride. Required at small doses for normal physiology. Not a quality concern in standard amounts.
- 15fatfish oil
Concentrated omega-3s. The reason 'EPA' and 'DHA' get to show up on the bag.
Position 15. Trace marine oil. Contributes some omega-3 but well below the level that drives EPA/DHA totals.
- 16l-lysine monohydrochloride
Stable form of L-lysine, an essential amino acid. Common in plant-heavy formulas to balance the amino acid profile.
- 17mineralcalcium carbonate
Source of calcium. Functional. Required in complete dog foods, especially those without bone-in meat meals.
- 18supplementcholine chloride
Essential nutrient for liver and brain function. Standard inclusion in complete dog foods.
- 19vitaminvitamin e supplement
Required nutrient and a natural antioxidant. Often pulls double duty as a preservative.
- 20mineralzinc sulfate
Inorganic zinc. Effective at AAFCO doses but less well-absorbed than chelated forms like zinc proteinate.
- 21mineralferrous sulfate
Inorganic iron. Standard mineral source. Iron proteinate is the gentler, better-absorbed premium form.
- 22vitaminniacin supplement
B vitamin (B3). Required in complete dog foods, added as a supplement to standardize the dose.
- 23mineralmanganese sulfate
Inorganic manganese. Functional but less well-absorbed than the chelated proteinate form.
- 24vitaminvitamin a supplement
Vitamin A in stable, standardized form. Required for vision, immune function, and growth.
- 25vitamincalcium pantothenate
Same as d-calcium pantothenate. Vitamin B5 in standardized form.
Showing first 25 of 36. Position 1-5 has the largest weight in the recipe.
22 of 25 ingredients have a curated note. Coverage grows over time.