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Chapel Farm Invest 'N' Digest Grain Free – Duck

Chapel Farm

Chapel Farm Invest 'N' Digest Grain Free: Duck review

63.9/100Good
DryAdult

A digestion-first pair in our Good band, built on a short list with no grain. The original holds salmon as its only animal ingredient, which is rare. The duck version scores a touch higher but brings poultry fat with it.

Where to buy: coming soon
Live retailer links are coming soon. Once we have them from UK retailers, where to buy and the best price will appear here.

Our view

Likely to suit

  • Dogs whose digestion needs a hand, with FOS and MOS both on the label
  • Elimination feeders: the salmon recipe names no animal beyond fish
  • Grain-avoiding homes, since sweet potato, potato and peas carry the starch
  • Maturing dogs. The salmon label covers seniors too

Worth watching

  • Unnamed poultry fat and salmon oil in the duck recipe
  • Starch close to half the dry matter, which suits steady dogs more than hard workers
  • Salmon supplied dried, hydrolysed and as gravy, not fresh

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

How this scores

How we score
63.9/100Good
Protein and processingGood
Nutritional balanceGood
TransparencyExcellent
ValueGood

The details

Dog fit

The salmon is listed for adults and seniors of any size, the duck for small adult dogs. Pick by the animal list first if the bowl must hold one protein.

Food type

Dry

Life stage

Adult

Breed size

Small

Main protein

Duck

The score, in context
  1. Duck 63.9
  2. Chapel Farm Invest 'N' Digest Grain Free 62.7

All two Good. Typical dry food: Good.

The two keep step, with the duck's small edge coming from its protein and balance readings.

What's in it
  • Duck: dried and fresh34% (26%, 8%)Mostly dried, which survives cooking well.
  • Dried sweet potatoes, dried potato flakes, dried peas16% each
  • Poultry fatSpecies not named.
  • Vegetable stock, linseed, dried beet pulp
  • Dried brewer's yeast, minerals
  • Salmon oil0.5%A trace, but it puts fish on the label.
  • Yeast hydrolysate, dried chicory0.5% eachThe prebiotics: MOS, beta glucans, FOS and inulin.
  • Yucca schidigera0.03%

Taurine at 1000 mg per kilo and L-carnitine at 500 mg, with the rest of the panel dosed in print.

Poultry fat and salmon oil mean this recipe cannot support a strict single-protein trial.

Named ingredients

Duck (34%, of which dried duck 26% and fresh duck 8%), dried sweet potatoes (16%), dried potato flakes (16%), dried peas (16%), poultry fat, vegetable stock, linseed, dried beet pulp, dried brewer's yeast, minerals, salmon oil (0.5%), yeast hydrolysate (a natural source of MOS and beta glucans) (0.5%), dried chicory (a natural source of FOS and inulin) (0.5%), Yucca schidigera (0.03%).
Against the range
Animals on the label
Duck, unnamed poultry fat, salmon oil
Salmon only in the original
Carbohydrate, dry matter
44.6%
46.9% in the salmon
L-carnitine
500 mg per kilo
100 mg in the salmon

The slightly stronger scorer of the two, at the cost of the single-animal claim.

Both bags keep grain out and lean on sweet potato, potato flakes and peas at matching shares for the starch. Estimated carbohydrate finishes at 46.9% and 44.6% of dry matter. Chicory and yeast hydrolysate bring the prebiotics, beet pulp the fibre, and taurine is dosed at 1000 mg per kilo in each.

What varies is the animal side: salmon alone in the original, duck with poultry fat and a little salmon oil in the second.

Nutritional analysis

Declared analysis

Energy
357 kcal/100g

Estimated using Modified Atwater factors*

Protein

27%

Fat

14%

Fibre

3%

Ash

7%

Dry weight

Protein

29.3%

Fat

15.2%

Fibre

3.3%

Ash

7.6%

Carbs

44.6%

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.

Meat

34%

Added water

6%

Carbs

50.5%

Veg

0.5%

Oils

5.1%

Other

3.8%

Pricing & size
Price per kilo
£3.33 (RRP)
Pack
12 kg
A 15kg dog eats
170 to 330 g a day, 250 in the middle
Cost per day, 15kg dog
£0.83

A smaller daily amount than the salmon for the same dog, so it costs less a day.

Budget end of the market for a dry food, though on the analysis alone you are paying a little more than it earns.

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