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Hill's Science Diet Adult Perfect Digestion Small Bites Chicken & Barley Recipe Dry Dog Food Hill's Prescription Diet i/d Small Bites Chicken Flavor Dry Dog Food

Hill's Prescription Diet i/d Small Bites Chicken Flavor Dry Dog Food scores higher on KibbleLab, 8.8 to 8.7. Compare ingredients, guaranteed analysis, and AAFCO nutritional adequacy, side by side.

Hill's Science Diet Adult Perfect Digestion Small Bites Chicken & Barley Recipe Dry Dog Food and Hill's Prescription Diet i/d Small Bites Chicken Flavor Dry Dog Food compared

Nutrients:
As Fed
Hill's Science Diet Adult Perfect Digestion Small Bites Chicken & Barley Recipe Dry Dog Food
Hill's Science Diet Adult Perfect Digestion Small Bites Chicken & Barley Recipe Dry Dog Food

Verified Jul 29, 2026

Hill's Prescription Diet i/d Small Bites Chicken Flavor Dry Dog Food
Hill's Prescription Diet i/d Small Bites Chicken Flavor Dry Dog Food

Verified Jul 21, 2026

KibbleLab score The KibbleLab expert rating, 0 to 10, based on published veterinary science. No one can pay for a higher score.
8.7 / 10 8.8 / 10
Guaranteed analysis (as fed)
Protein Guaranteed analysis gives label minimums and maximums, not measured values, shown as fed.
Not listed Not listed
Fat Not listed Not listed
Fiber 2.10% 2.00%
Calcium 0.95% 0.87%
Phosphorus 0.75% 0.60%
Omega-3 0.52% Not listed
Omega-6 3.66% 2.93%
Taurine Not listed 0.12%
Moisture Higher moisture means a wetter food; it dilutes the other percentages above.
Not listed Not listed
Calories 3607 kcal/kg 3589 kcal/kg
Calorie density Moderate Moderate
Ingredients
Full ingredient list Every ingredient on each label, in order of weight.
Chicken, Cracked Pearled Barley, Brown Rice, Brewers Rice, Whole Grain Oats, Whole Grain Corn, Corn Protein Meal, Chicken Meal, Chicken Fat, Chicken Liver Flavor, Pork Liver Flavor, Ground Pecan Shells, Soybean Oil, Lactic Acid, Potassium Chloride, Flaxseed, Dried Beet Pulp, Dried Citrus Pulp, Iodized Salt, Choline Chloride, Calcium Carbonate, Dicalcium Phosphate, Fish Oil, Pressed Cranberries, Pumpkin, vitamins (Vitamin E Supplement, L-Ascorbyl-2-Polyphosphate (source of Vitamin C), Niacin Supplement, Thiamine Mononitrate, Vitamin A Supplement, Calcium Pantothenate, Riboflavin Supplement, Biotin, Vitamin B12 Supplement, Pyridoxine Hydrochloride, Folic Acid, Vitamin D3 Supplement), minerals (Ferrous Sulfate, Zinc Oxide, Copper Sulfate, Manganous Oxide, Calcium Iodate, Sodium Selenite), Taurine, Mixed Tocopherols for freshness, Natural Flavors, Beta-Carotene. Show full list
Chicken, Cracked Pearled Barley, Brown Rice, Brewers Rice, Whole Grain Corn, Corn Protein Meal, Chicken Fat, Chicken Meal, Egg Product, Chicken Liver Flavor, Pork Liver Flavor, Ground Pecan Shells, Lactic Acid, Potassium Chloride, Flaxseed, Dried Beet Pulp, Calcium Carbonate, Dried Citrus Pulp, L-Lysine, Choline Chloride, Fish Oil, Iodized Salt, Pressed Cranberries, L-Threonine, vitamins (Vitamin E Supplement, L-Ascorbyl-2-Polyphosphate (source of Vitamin C), Niacin Supplement, Thiamine Mononitrate, Calcium Pantothenate, Vitamin A Supplement, Pyridoxine Hydrochloride, Biotin, Riboflavin Supplement, Vitamin B12 Supplement, Folic Acid, Vitamin D3 Supplement), L-Tryptophan, Taurine, minerals (Ferrous Sulfate, Zinc Oxide, Copper Sulfate, Manganous Oxide, Calcium Iodate, Sodium Selenite), DL-Methionine, Mixed Tocopherols for freshness, Natural Flavors, Magnesium Oxide, Beta-Carotene. Show full list
Limited ingredient No No
Health focus Digestive health, Probiotic support Digestive health, Urinary care, Skin coat health, Immune support, Probiotic support
Format & suitability
Food type Dry Dry
Texture Kibble Kibble
Processing Not listed Not listed
Life stage Adult Adult
Breed size All Breed Sizes All Breed Sizes
AAFCO nutritional adequacy
Complete & balanced Whether the manufacturer's label claims the food meets AAFCO nutrient profiles for a life stage. Not an independent test.
Yes Yes
Life stages Adult Maintenance Adult Maintenance
Substantiation How adequacy was established. Feeding trials are the higher bar; formulation means the recipe is calculated to meet the profile.
Feeding Trials Feeding Trials
Maker standards
WSAVA guidelines The World Small Animal Veterinary Association publishes criteria for evaluating a manufacturer: qualified nutritionists on staff, feeding trials, and published research. It does not certify or endorse brands.
Yes Yes
PSC accredited The Pet Sustainability Coalition is a nonprofit that accredits pet companies on their environmental and social impact through third-party verification. It reflects sustainability practices, not food quality.
Yes Yes
Recalls & where to buy
Recalls on record KibbleLab began logging recalls in July 2026, so earlier recalls may not appear.
None None
Where to buy
Amazon
Amazon

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Shared ingredients

Both foods list these among their top ingredients, by label weight.

  • Chicken
  • Barley
  • Brown Rice
  • Brewer's Rice
  • Whole Grain Corn
  • Corn Protein Meal
  • Chicken Fat
  • Chicken Liver Flavor

Not sure which is right for your pet?

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Common Questions

Which food scores higher on KibbleLab?

Hill's Prescription Diet i/d Small Bites Chicken Flavor Dry Dog Food scores higher, 8.8 to 8.7 out of 10. Scores reflect published veterinary science, and no one can pay for a higher score.

Do these two foods share ingredients?

Yes. They share these top ingredients: Chicken, Barley, Brown Rice, Brewer's Rice, Whole Grain Corn, Corn Protein Meal, Chicken Fat, Chicken Liver Flavor.

Are both foods AAFCO complete and balanced?

Yes, both foods are labeled AAFCO complete and balanced.

See the full profiles: Hill's Science Diet Adult Perfect Digestion Small Bites Chicken & Barley Recipe Dry Dog Food and Hill's Prescription Diet i/d Small Bites Chicken Flavor Dry Dog Food .

KibbleLab provides informational content only. This is not veterinary advice. Always consult a qualified veterinarian before changing your pet's diet.

This is a neutral, factual comparison, not a ranking or an endorsement of either product. A food's guaranteed analysis gives legal minimums and maximums for a few nutrients, not measured values. No one can pay for placement or a higher score.

Product details are compiled from public sources and may not reflect the latest formulation. Represent one of these brands? Request a correction. Anyone else can email us.