

Hill's Science Plan
Hill's Science Plan Adult 1-5 Light Large review
Hill's Science Plan Adult 1-5 Light Large rebuilds a large breed recipe around fibre. Pea bran meal leads the list and cellulose sits in the middle of it, lifting crude fibre to 12.3%, which is where the fullness in a light diet comes from. Behind it sits chicken and turkey meal, chicken at 9% and total poultry at 14%. Pork cartilage and crustacean shell hydrolysate carry the joint pairing through. Energy is held to 312 kcal per 100g against the 357 a typical adult dry food carries. It lands in our Average band.
Our view
Likely to suit
Extra weight is harder on a big frame than a small one, and this is the recipe you reach for when yours needs to lose a little.
- Large breed adults on a weight plan, with energy held to 312 kcal per 100g
- Dogs who beg between meals, since crude fibre at 12.3% is there to keep them feeling fed
- Owners who like a number against the bird, since the label prints chicken at 9% and total poultry at 14%
- Big dogs carrying a bit of wear in the joints, since pork cartilage and crustacean shell hydrolysate are both on the list
Worth watching
A light diet earns its name in specific ways, and these are the ones you should understand here.
- Cellulose is a purified fibre, so a good part of the bulk in this bowl is there for fullness rather than nourishment
- Behind the pea bran sit maize and wheat, one to note if wheat has been a problem for yours
- The two fats, vegetable oil and animal fat, are listed without a source, so this cannot anchor an exclusion trial
- Glucosamine comes from crustacean shell, so a household avoiding shellfish should know it is in here
- High fibre makes for bigger and more frequent stools, so a dog with a fixed toilet routine may need an extra garden trip
Written by our editorial team. Independent guidance, not veterinary advice.
How this scores
How we scoreThe Details
Dog fit
Extra weight is harder on a big frame than a small one, and this is the recipe you reach for when yours needs to lose a little. A light diet earns its name in specific ways, and these are the ones you should understand here.
Dry
Adult
Large
Chicken
The score, in context
Two halves of this label pull in opposite directions, and the Average band is where they settle, a step under the Good band a typical adult dry food reaches. Nutritionally it does something unusual for a kibble: carbohydrate converts to 45.6% of dry matter, just under the 46.2% typical, and the energy is deliberately kept down.
The recipe side is where it loses ground, with a purified fibre and two unnamed fats doing a fair amount of the work. Transparency still reads Good, because the poultry percentages are printed. For a large dog who needs to come down a size, this is a recipe doing precisely the job it was designed for.
What's in it
Ingredients, as declared: Pea bran meal, chicken and turkey meal (chicken 9%; total poultry 14%), maize, wheat, broken rice, maize protein meal, digest, cellulose, dried beet pulp, vegetable oil, animal fat, minerals, flaxseed, oat bran, fructo-oligosaccharides, pork cartilage (source of chondroitin sulphate), crustacean shell hydrolysate (source of glucosamine). ActivBiome+ Multi Benefit prebiotic blend (0.6%): Oat bran, fructo-oligosaccharides.
Named ingredients
Nutritional additives
ADDITIVES PER KG: Nutritional additives: 3b103 (Iron) 75.2mg, 3b202 (Iodine) 1.9mg, 3b405 (Copper) 7.4mg, 3b502 (Manganese) 7.8mg, 3b603 (Zinc) 132mg, 3b801 (Selenium) 0.2mg, with natural antioxidant.
Ingredient notes
Pea bran meal heads the list. It is the fibrous outer coat of the pea, not the whole pea. It brings bulk and very little energy, which is exactly what a light diet is after, though it should not be read as a whole pea and everything a whole pea contains.
The other fibre is cellulose, and it deserves a straight word. It is purified plant fibre, effectively indigestible, and it is in a recipe like this to fill a dog up while contributing almost nothing in calories. It is a functional ingredient, not a nourishing one. Between the two, crude fibre reaches 13.4% of dry matter, several times what a standard adult kibble carries.
Maize, wheat and broken rice do the starch work behind the fibre, with maize protein meal adding plant protein. Wheat is the entry most likely to matter to an owner. No other grain is blamed so often when a dog stops agreeing with its dinner.
The poultry is quantified where a lot of labels would leave it vague: chicken at 9% and total poultry at 14%, supplied as a dried meal that concentrates protein rather than water. Protein finishes at 25.0% of dry matter. The fats are the weaker half, with vegetable oil and animal fat both listed without a source, and total fat kept to 10.3% of dry matter as a light recipe should.
Pork cartilage supplies chondroitin and a crustacean shell hydrolysate supplies glucosamine, the standard joint pairing for a large breed food, though neither comes with a printed dose. The crustacean entry means the recipe is not shellfish free. Flaxseed brings plant omega 3. The 0.6% ActivBiome+ blend pairs oat bran with fructo-oligosaccharides, both prebiotic fibres, with dried beet pulp just behind.
The mineral panel is dosed in print at zinc 132 mg, iron 75.2 mg, copper 7.4 mg, manganese 7.8 mg, iodine 1.9 mg and selenium 0.2 mg per kilo. A natural antioxidant is the preservative. Calcium works out at 0.95% of dry matter, a settled adult level.
Price and value
Sold in 14 kg and 18 kg bags.
Feeding a 15kg adult in moderate condition would take about 269 grams a day on the standard maintenance estimate of roughly 840 kcal a day (110 × bodyweight^0.75). The dogs this recipe is built for are larger again, and the label's guidance is written at that end, with an 80kg dog on 640 grams a day.
Nutritional analysis
Declared analysis
23%
9.5%
12.3%
5.2%
8%
Dry weight
25%
10.3%
13.4%
5.7%
45.6%
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.
25.8%
72.4%
0.6%
1.2%
Pricing & size
- Pack size
- 18 kg, 14 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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