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Hill's Science Diet Perfect Weight

Manufacturer: Hill's Science Diet

Hill's Science Diet Hill's Science Diet Perfect Weight Chicken & Brown Rice
81Technical Score

The Hill's Science Diet Perfect Weight (Hill's Science Diet) earned a technical score of 81/100 (rated ⭐ High Standard) under the independent My Pet Magazine methodology, which combines the IDNM nutrient density index (70 pts) and the IPFI ingredient purity index (89 pts). On a dry-matter basis, this food for dogs delivers 25.56% protein and 11.67% fat. The analysis is computed by algorithm, with no payment or interference from brands.

Is Hill's Science Diet Perfect Weight good?

Yes, it is a good option. Hill's Science Diet Perfect Weight is in the "High Standard" band of our review, with a technical score of 81/100. The score combines nutritional density (IDNM 70) and ingredient purity (IPFI 89), with 25.56% protein and 11.67% fat on a dry-matter basis. At 3189 kcal/kg, FEDIAF maintenance needs work out to 168–194 g per day for an adult dog weighing 10 kg (full table below).

Nutritional Analysis

IDNM (Nutrient Density)70 / 100
IPFI (Ingredient Purity)89 / 100
Final Score81

Dry-Matter Composition

Protein25.56%
Fat11.67%
Carbohydrates33.89%
Ash8.89%

Composition and Energy

Values as declared in the manufacturer guaranteed analysis (as-fed basis — as printed on the bag).

Nutritional composition of Hill's Science Diet Perfect Weight (metabolizable energy when available in the dataset)
NutrientValue
Crude protein23 %
Crude fat10.5 %
Crude fiber18 %
Ash (mineral matter)8 %
Moisture10 %
Metabolizable energy3189 kcal/kg

How much to feed per day

Estimated daily serving (g/day) based on the metabolizable energy of this food (3189 kcal/kg) and the maintenance energy requirement (MER) of an adult dog per FEDIAF 2024, from the lowest value (low-activity dog; neutered or indoor cat) to the moderate one (moderately active dog; active cat). It is a starting point: adjust to your pet's body condition and your veterinarian's advice. The calculation ignores age, neutering (in dogs) and individual clinical conditions.

Recommended daily serving in grams per day of Hill's Science Diet Perfect Weight by the weight of the dog
Weight of the dogEnergy requirementRecommended serving
5 kg318–368 kcal/day100–115 g/day
10 kg534–619 kcal/day168–194 g/day
20 kg898–1040 kcal/day282–326 g/day
30 kg1218–1410 kcal/day382–442 g/day
40 kg1511–1750 kcal/day474–549 g/day

Formula: maintenance energy (kcal/day) = coefficient × weight(kg)^exponent. Dogs: coefficient 95 (low activity) to 110 (moderate activity), exponent 0.75 (FEDIAF 2024, Table VII-7, p. 55). Cats: coefficient 75 (neutered or indoor) to 100 (active), exponent 0.67 (FEDIAF 2024, Table VII-9, p. 57). Portion (g/day) = energy requirement ÷ (food kcal/kg ÷ 1000). Source: FEDIAF, Nutritional Guidelines for Complete and Complementary Pet Food for Cats and Dogs, July 2024.

Ingredients

  1. 1Chicken
  2. 2Cracked Pearled Barley
  3. 3Brown Rice
  4. 4Pea Fiber
  5. 5Corn Protein Meal
  6. 6Chicken Meal
  7. 7Dried Tomato Pomace
  8. 8Oat Fiber
  9. 9Chicken Liver Flavor
  10. 10Flaxseed

What we like

  • ✓glucosamine and chondroitin
  • ✓EPA/DHA declared
  • ✓L-carnitine
  • ✓fresh meat first ingredient
🥇
Feeding TrialsAAFCO feeding trial declared: +5 pts (Gold level)
✓ Verified data

www.chewy.com (as-fed guaranteed analysis from the label) — verified 2026-08-30

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Frequently asked questions about Hill's Science Diet Perfect Weight

What is the technical score of Hill's Science Diet Perfect Weight?
Hill's Science Diet Perfect Weight (Hill's Science Diet) scores 81/100 under the My Pet Magazine methodology — a weighted average of the IDNM nutrient density index (70 points) and the IPFI ingredient purity index (89 points), by the formula (IDNM × 0.55) + (IPFI × 0.45). The analysis is 100% algorithmic, with no interference from brands.
How much protein does Hill's Science Diet Perfect Weight have?
On a dry-matter basis (removing the effect of moisture), Hill's Science Diet Perfect Weight has 25.56% protein, 11.67% fat and 33.89% carbohydrates. Converting to a dry-matter basis allows a fair comparison between foods for dogs with different moisture levels.
Is Hill's Science Diet Perfect Weight a good food for dogs?
Under the My Pet Magazine classification, Hill's Science Diet Perfect Weight is "High Standard" (score 81/100). Strengths: glucosamine and chondroitin, EPA/DHA declared, L-carnitine. Talk to a veterinarian before changing the diet of your dog.

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