

Hill's Prescription Diet
Hill's Prescription Diet On-Care Dry Dog Food review
We don't put a score on this food. It is a veterinary diet, formulated for a diagnosed condition and meant to be fed on a vet's advice. Your vet has seen your dog and we have not, so a number from us could only pull you towards their advice or away from it, and neither of those is ours to do. What follows is what the label declares, what the analysis works out at, and where to buy it, with no judgement attached to any of it.
On-Care is a calorie-dense and highly digestible kibble in the Hill's Prescription Diet range. The maker offers it as nutritional support for dogs whose appetite and body condition need holding up while a vet manages the wider problem.
The Details
Dog fit
Dry
Adult
Toy, Small, Medium, Large, Giant
Chicken
What's in it
Ingredients, as declared: Cereals, meat and animal derivatives (chicken 15%), oils and fats, vegetable protein extracts, derivatives of vegetable origin, minerals, fruit, seeds. ActivBiome+ prebiotic blend (4%): Ground pecan shell, dried beet pulp, flaxseed, dried citrus pulp, dried cranberries. Highly digestible ingredients: Chicken and turkey meal, wheat, animal fat, maize, maize gluten meal, digest, fish oil, vegetable oil.
Named ingredients
Nutritional additives
Nutritional additives: 3b103 (Iron) 78.5mg, 3b202 (Iodine) 1.9mg, 3b405 (Copper) 7.7mg, 3b502 (Manganese) 8.1mg, 3b603 (Zinc) 138mg, 3b801 (Selenium) 0.2mg, with natural antioxidant. Metabolisable energy: 4,061 kcal/kg.
What's on the label
The top of the label is category wording, cereals first, then meat and animal derivatives with chicken at 15%, then oils and fats, vegetable protein extracts, derivatives of vegetable origin, minerals, fruit and seeds. Underneath that, Hill's does something more useful for a reader and prints two named blocks.
Its ActivBiome+ prebiotic blend comes first, declared at 4%. The make-up is printed under it: ground pecan shell at the head, with dried beet pulp and flaxseed after that. Dried citrus pulp and dried cranberries close it. What these entries feed is the gut flora rather than the dog, and Hill's gives each of them a line instead of folding them into the category terms above.
The second block is what the maker calls its highly digestible ingredients: chicken and turkey meal, wheat, animal fat, maize, maize gluten meal, digest, fish oil and vegetable oil. Digest is a processed animal palatant that coats the outside of the kibble. In a food aimed at a dog who may not much feel like eating, making the bowl smell worth crossing the room for is a functional requirement.
Read together, those two blocks put chicken, turkey, wheat, maize and fish in the recipe. That is more detail than the category terms alone would ever give you, and it also means more named ingredients to check off if your dog has a sensitivity on record.
On the analysis, this reads nothing like the weight management side of the range. Protein is declared at 29.5% and fat at 21.7%, converting to 32.1% and 23.6% of dry matter, crude fibre is low at 2.3%, and the carbohydrate estimate sits at 36.7% of dry matter. Energy reads 407 kcal per 100g, so a smaller bowl carries more calories, which is the deliberate design when appetite or condition is what needs managing.
The trace minerals are dosed on the pack, iron at 78.5mg, iodine at 1.9mg, copper at 7.7mg, manganese at 8.1mg, zinc at 138mg and selenium at 0.2mg, alongside a natural antioxidant. The feeding guide opens at 30 grams a day for a 1kg dog, reads 155 grams at 10kg and reaches 520 grams for a 50kg dog. Adjusting those amounts as things change is a job for the practice that started your dog on it.
Price and where to buy
The bags run 1.5kg, 4kg and 10kg, at £5.53 a kilo. Working from a 15kg dog eating 207 grams a day, that comes out at about £1.14 a day.
Nutritional analysis
Declared analysis
29.5%
21.7%
2.3%
4.7%
Dry weight
32.1%
23.6%
2.5%
5.1%
36.7%
As-fed composition
Estimated breakdown of the finished product by ingredient category, from the declared ingredient list and ingoing weights. These are estimates, not measurements.
25.3%
57.6%
1.7%
8.2%
7.2%
Pricing & size
- Pack size
- 10 kg, 4 kg, 1.5 kg
- Retailer pricing
- Coming soon
Live retailer pricing is not yet available for this food. Prices, cost per day and where to buy will appear here once retailer data is live.
Ingredients and nutrition are taken from manufacturer data. Retailer pricing is not yet live for this food.
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