by Hill’s
Adult
Regular

Hill’s

Science Plan - Adult Cat Food with Lamb & Rice

Adult
Regular
1

First Ingredient

Plant Protein

Flavor

Lamb

Kibble Size

~7 mm

Approximate diameter or width of each kibble
Cat Food Central Quality Score: 49 out of 100
647 views

Available sizes

1.5 kg
3.3 lb
3 kg
6.6 lb
10 kg
22 lb

Summary

Hill’s Science Plan Adult Cat Food with Lamb & Rice is a complete dry diet for adult cats aged 1–6, designed to support digestive health, urinary balance, skin and coat condition, and steady energy needs.
The first ingredient, broken rice, is an easily digestible carbohydrate that provides quick, gentle energy for the gut.
Chicken and turkey meal are the primary animal protein sources to maintain lean muscle, while maize protein meal and pea protein contribute additional amino acids.
ActivBiome+ Multi-Benefit Technology combines prebiotic fibers and antioxidants—supported here by fructo-oligosaccharides, dried beet pulp, and oat bran—to nourish beneficial gut bacteria and promote regular stools.
At 32.5% crude protein and 20.2% fat with an energy density of 4,086 kcal/kg, the formula fuels active adult cats and may require portion control for less active indoor cats.
Balanced minerals—including calcium 0.77%, phosphorus 0.73%, and magnesium 0.07%—help support kidney and bladder health by moderating urinary mineral load.
Taurine at 0.19% supports normal heart function and vision, which are crucial for adult cats.
Fish oil and soybean oil supply omega-3 (0.43%) and omega-6 (3.07%) fatty acids, while vitamin E (744 IU/kg) and beta-carotene provide antioxidant support for skin, coat, and immune defenses.
Lamb meal appears at 4%, adding variety in animal proteins, though the recipe relies primarily on poultry meals for protein and broken rice for energy.
The low crude fiber level (0.9%) favors digestibility but offers limited satiety or hairball control, so individual needs should guide feeding amounts.

Pros
Expand All
1

Microbiome and digestion support

ActivBiome+ with prebiotic fibers (fructo-oligosaccharides, beet pulp, oat bran) feeds beneficial gut bacteria and helps maintain consistent stools.
2

Muscle maintenance

32.5% crude protein with chicken and turkey meal as core animal proteins supports lean body mass in adult cats.
3

Urinary health minerals

Controlled calcium (0.77%), phosphorus (0.73%), and magnesium (0.07%) help support kidney and bladder well-being.
4

Skin, coat, and antioxidant defense

Omega-6 (3.07%), omega-3 (0.43%), vitamin E (744 IU/kg), and beta-carotene nourish the skin barrier, promote coat shine, and combat oxidative stress.
5

Cardiac protection

Taurine at 0.19% supports normal heart function and vision, essential for adult maintenance.
6

Palatability support

Animal fat and digest can enhance aroma and taste, encouraging good food acceptance.
Cons
Expand All
1

Carbohydrate-forward recipe

Broken rice as the first ingredient, plus maize, drives an NFE carbohydrate level of 35.4%, which may not suit cats needing lower-carb diets.
2

Plant protein concentrates

Maize protein meal and pea protein contribute to total protein, which may reduce the proportion of animal-derived amino acids some owners prefer for obligate carnivores.
3

Lamb is a minor component

Lamb meal is present at 4%, so the formula is not lamb-centric and may not fit limited-ingredient or single-protein preferences.
4

High energy density

At 4,086 kcal/kg and 20.2% fat, careful portion control is needed for sedentary or indoor cats to avoid unwanted weight gain.
5

Very low fiber

With crude fiber at 0.9%, the diet offers limited support for satiety and hairball management.
6

Multiple animal proteins

Poultry and lamb, plus fish oil, may complicate feeding trials for cats with suspected single-protein sensitivities.

Nutrition

Ingredients

  • Broken Rice
  • Chicken And Turkey Meal
  • Maize
  • Animal Fat
  • Maize Protein Meal
  • Pea Protein
  • Lamb Meal 4%
  • Digest
  • Minerals
  • Dried Beet Pulp
  • and also:
Fish Oil, Soybean Oil, Oat Bran, Vitamins, Fructo-Oligosaccharides, Taurine, Trace Elements And Beta-Carotene. With A Natural Antioxidant (Mixed Tocopherols)

Vitamins and Additives

  • Vitamin A 8949 IU
  • Vitamin C 103 ppm
  • Vitamin D 735 IU
  • Vitamin E 744 mg/kg

Guaranteed Analysis

Crude Protein
32.5%
Crude Fat
20.2%
Crude Fiber
0.9%
Moisture
6%
Crude Ash
5.5%
Calcium
0.77%
Phosphorus
0.73%
Potassium
0.71%
Magnesium
0.07%
Omega 3
0.43%
Omega 6
3.07%
Metabolizable Energy
4086 kcal/kg
Carbohydrate (NFE) 35.4 %, Sodium 0.35 %, Taurine 0.19 %, Beta-carotene 2.78 ppm

Comments

Important Notice: Product details may vary by region. The information presented here is sourced from hillspet.co.uk - UK English site

Guaranteed Analysis

Crude Protein
32.5%
Crude Fat
20.2%
Crude Fiber
0.9%
Moisture
6%
Crude Ash
5.5%
Calcium
0.77%
Phosphorus
0.73%
Potassium
0.71%
Magnesium
0.07%
Omega 3
0.43%
Omega 6
3.07%
Metabolizable Energy
4086 kcal/kg
Carbohydrate (NFE) 35.4 %, Sodium 0.35 %, Taurine 0.19 %, Beta-carotene 2.78 ppm
Last reviewed:
We periodically review this product’s details and update them to match the manufacturer’s latest published information, but some changes may not be reflected immediately. View the product change history.

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Product changes
Hill’s

Science Plan - Adult Cat Food with Lamb & Rice

Product changes

16-12-2025
  • 6th Ingredient Value changed from 4% -> %
  • 7th Ingredient changed from Lamb Meal (4%) -> Lamb Meal
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How the score is calculated?

The actual calculation of the score is based on sophisticated and advanced algorithm that takes into account multiple parameters.

To simplify the explanation, the calculation is based on three main criteria:

(1) Amount of protein (more is better)

(2) Amount of carbohydrates (less is better)

(3) Quality and source of ingredients.

Based on that 3 main criteria, 9 score calculation rules are used to compare the different foods.

One major assumption is that the closer an ingredient is to the top of the ingredient list, the greater its relative weight and contribution to the food.

In general, cat food is composed of protein, fats, carbohydrates, fibers, vitamins, and minerals.

Protein is the most important component in a cat's diet, and cats primarily get their protein from animal meat.

Fat is a primary source of energy and essential fatty acids.

Carbohydrates are controversial in a cat's diet, as cats are obligate carnivores and typically consume very few carbohydrates.

Fibers play an important role in digestion and food absorption, and vitamins and minerals are essential for different organism functions.

Dry matter values are used to compare the amount of nutrients in different cat foods. This means that moisture is excluded from the equation to provide a more accurate comparison.

Putting all of these and more into a formula results in a product score.

The maximum score a cat food can receive is 100. Points are added or removed based on the score calculation rules.

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