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Hill's Science Plan Perfect Digestion Large Breed Adult 1+ Dog Food with Chicken and Brown Rice – —

Hill's Science Plan

Hill's Science Plan Perfect Digestion Large Breed Adult 1+ Dog Food with Chicken and Brown Rice review

37.6/100Average
DryAdultSenior

Hill's Science Plan Perfect Digestion Large Breed Adult 1+ with Chicken and Brown Rice puts a named fibre blend at the centre of a big dog's kibble, declaring ActivBiome+ Digestion at 4%. The label prints what goes into it: ground pecan shell, dried beet pulp, flaxseed, dried citrus pulp and dried cranberries. Wheat and maize lead the recipe, the chicken and turkey meal is declared at 6% chicken and 10% total poultry, and the analysis is a moderate one at 18.4% protein and 11.7% fat. The cereal share of the bag keeps it in our Average band.

Where to buy: coming soon
Live retailer pricing is coming soon. Once we have prices from UK retailers, the best price, cost per day and where to buy will appear here.

Our view

Likely to suit

A big dog with an unreliable gut makes life harder for everyone in the house, and this recipe goes after that directly.

  • Large breed adults from a year old whose digestion has never quite settled down
  • Owners who want a fibre blend declared with a percentage, since ActivBiome+ Digestion is printed at 4% with all five of its components named
  • Big dogs suited by a moderate fat intake, with fat declared at 11.7%
  • Households with one large dog to feed, since the recipe comes in a single 14kg bag
  • Owners who want the mineral panel dosed in print, with zinc at 147 mg and iron at 83.7 mg per kilo

Worth watching

Take these in before you commit to the first bag.

  • Wheat and maize hold the first two places, so the base of this food is cereal
  • Named poultry reaches 10%, with chicken at 6%, and maize protein meal supplies further protein from a plant
  • Neither animal fat nor digest is named, and a strict exclusion diet needs those details
  • Estimated carbohydrate is 59.3% of dry matter against 46.2% for a typical dry food, a lot for a big dog that likes plenty of meat in its bowl
  • No glucosamine or chondroitin source is listed, which plenty of large breed owners look for as standard

Written by our editorial team. Independent guidance, not veterinary advice.

How this scores

How we score
37.6/100Average
Protein and processingPoor
Nutritional balancePoor
TransparencyGood
ValueAverage

The Details

Dog fit

A big dog with an unreliable gut makes life harder for everyone in the house, and this recipe goes after that directly. Take these in before you commit to the first bag.

Food type

Dry

Life stage

Adult, Senior

Breed size

Large

Main protein

Chicken

The score, in context

There is a clear distance between this label and the typical adult dry food, which our scoring reads as Good while this one reads Average. Composition explains it. Cereal leads, named poultry totals 10%, maize protein meal adds plant protein behind it, and estimated carbohydrate settles at 59.3% of dry matter. Protein and processing and nutritional balance both read Poor, though transparency reads Good. Worth holding alongside that is what the recipe is actually for. A fibre blend declared at 4% with all five parts named in print is more than most digestive kibbles commit to. A big dog whose stools firm up on it has had the only result that really counts.

What's in it

Ingredients, as declared: Wheat, maize, chicken and turkey meal (chicken 6%; total poultry 10%), animal fat, digest, broken rice, maize protein meal, brown rice (4%), barley (3.2%), oats (3.2%), ground pecan shell, minerals, dried beet pulp, flaxseed, dried citrus pulp, dried cranberries. ActivBiome+ Digestion prebiotic blend (4%): Ground pecan shell, dried beet pulp, flaxseed, dried citrus pulp, dried cranberries.

Named ingredients

Wheat, maize, chicken and turkey meal (chicken 6%; total poultry 10%), animal fat, digest, broken rice, maize protein meal, brown rice (4%), barley (3.2%), oats (3.2%), ground pecan shell, minerals, dried beet pulp, flaxseed, dried citrus pulp, dried cranberries. ActivBiome+ Digestion prebiotic blend (4%): Ground pecan shell, dried beet pulp, flaxseed, dried citrus pulp, dried cranberries.

Nutritional additives

ADDITIVES PER KG: Nutritional additives: 3b103 (Iron) 83.7mg, 3b202 (Iodine) 2.1mg, 3b405 (Copper) 8.3mg, 3b502 (Manganese) 8.7mg, 3b603 (Zinc) 147mg, 3b801 (Selenium) 0.2mg, with natural antioxidant.

Ingredient notes

Wheat and maize open the list and set the carbohydrate load, with broken rice, brown rice at 4% and barley and oats at 3.2% each filling in behind them. That is a wide spread of starches for one recipe, and a varied one, though it adds up to a great deal of grain by weight.

The bag is named for that blend, declared at 4% and broken out in full: flaxseed, dried cranberries, dried beet pulp, dried citrus pulp and ground pecan shell. Pecan shell is a coarse insoluble fibre that adds bulk, beet pulp ferments gently and feeds the gut's resident bacteria, and the citrus pulp and cranberries carry soluble fibre and plant antioxidants. Printing both the percentage and the components lets an owner judge the claim instead of taking it on trust.

The animal protein sits in one entry, a chicken and turkey meal at 6% chicken and 10% total poultry. Meal is rendered and dried before mixing, so that 10% carries more protein than fresh meat declared at the same size would. The panel reads 18.4% protein, or 20.0% of dry matter. Maize protein meal sits behind it as a plant protein concentrate, doing part of the same job without being meat.

The main energy source is animal fat, with no animal given. Digest, the palatant sprayed on to make kibble taste of something, is equally unspecific. Neither is unusual in a kibble made at this scale, though together they leave a gap where a full account of the animal content would sit.

Crude fibre finishes at 2.8% of dry matter, which is modest, so as with any fibre led recipe the effect comes from the mix rather than the mass. The trace minerals are dosed per kilo: zinc at 147 mg, iron at 83.7 mg, manganese at 8.7 mg, copper at 8.3 mg, iodine at 2.1 mg and selenium at 0.2 mg. Calcium converts to 0.85% of dry matter, a settled level for an adult dog of any size.

Price and value

£5.00 a kilo, sold in a 14kg bag.

As a guide, a 15kg adult dog in moderate condition would eat about 238 grams a day, assuming around 840 kcal a day (110 × bodyweight^0.75, the standard maintenance estimate). That comes to £1.19 a day. A large breed dog will get through considerably more than that, so use the label's feeding table as the starting point and let condition settle the rest.

Nutritional analysis

Declared analysis

Energy
352.4 kcal/100g
Protein

18.4%

Fat

11.7%

Fibre

2.6%

Ash

4.8%

Moisture

8%

Dry weight

Protein

20%

Fat

12.7%

Fibre

2.8%

Ash

5.2%

Carbs

59.3%

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.

Meat

19.3%

Carbs

70.5%

Oils

4.4%

Other

5.8%

Pricing & size
Pack size
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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Reviewed by Off the Leash Editorial

Last updated 28 August 2026