Eukanuba Large Breed: Fresh Chicken vs Grain-Free Ocean Fish
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A 40 kg dog on either of these foods is guided to roughly the same daily amount, around 405 to 470 g, so the choice is not about portion size or protein level. Eukanuba Adult Large & Giant Breed Fresh Chicken and Eukanuba Adult Large & Giant Breed Grain-Free Ocean Fish differ in what the protein is, whether grain is included, and which dogs the listings point towards.
Feeding guidance on the listings
| Dog's weight | Fresh Chicken (g per day) | Ocean Fish (g per day) |
|---|---|---|
| 25 kg | 285 to 330 | 285 to 330 |
| 40 kg | 405 to 470 | 410 to 470 |
| 50 kg | 480 to 555 | 480 to 560 |
Both listings say these are rough guidelines and that you should adjust amounts to keep your dog at a healthy weight. The Ocean Fish listing also gives figures for 70 kg and 90 kg dogs, so check the bag for the chicken recipe's figures if your dog is a true giant.
The protein and the grain
The chicken recipe lists fresh chicken (20%) first, followed by dried chicken and turkey (19%). The carbohydrate side is cereal-heavy: maize, wheat, barley, oats and sorghum all appear. The Ocean Fish recipe starts with fish meal (28%), then dried sweet potatoes (20%), whole peas and dried potatoes, with no cereals listed. The listing describes it as chicken-free and as a limited ingredient list intended to avoid common allergens.
Two details complicate that picture. The fish recipe includes pork fat, so it is not free of every animal ingredient that some dogs react to. And the listing carries a note that it was produced in a factory that handles grains, so it is grain-free by recipe rather than by a grain-free factory.
On the numbers printed in the listings:
- Protein is 24% for chicken and 25% for fish, and fat is 13% for both.
- Omega-3 is 0.29% in the chicken recipe and 0.6% in the fish one.
- Both include prebiotic fructooligosaccharides and glucosamine at similar levels, and both mention beet pulp.
- The chicken recipe adds L-carnitine, which the listing connects with weight management. The fish recipe lists added taurine among its additives.
Who each one suits
The chicken recipe is the conventional choice for a large dog with no known food problems. It uses ordinary cereals rather than peas and potato. Both listings make the same bone, joint and dental claims, with calcium and glucosamine for joints and a kibble shape with DentaDefense minerals aimed at teeth. Those are the maker's claims, and a kibble is not a substitute for brushing.
The fish recipe makes sense if chicken has been a problem for your dog, if a vet has suggested leaving out grain, or if your dog simply does better on fish. The listing specifies large breed adult dogs of 25 to 40 kg from 18 months to 6 years, and giant breeds of 40 kg and over from 2 to 5 years. That is a narrower window than most owners expect, so a younger dog or an older one is outside the stated range. The chicken listing gives no ages.
Large dogs have particular needs, and our roundup of large and giant breed food looks at what to prioritise across the category.
Weight matters more than the recipe
For a large dog the bigger risk is usually weight gain, not which protein is in the bowl. Both listings stress adjusting the amount to keep an ideal body weight, and both feeding ranges are wide, so start at the lower end for a calm dog and the upper end for a very active one, then watch the waist and ribs over a few weeks. Count treats and chews in the daily total.
Drawbacks
- The chicken recipe contains wheat, barley and maize alongside chicken, so it is not a food for a dog with a known grain or poultry problem.
- The fish recipe is built on peas and potato as well as sweet potato. There has been research, still unsettled, on whether some grain-free, legume-rich diets are linked to heart problems in dogs, which is a reasonable thing to raise with your vet. Our guide to grain-free versus grain-inclusive food covers the background.
- The fish listing has 67 ratings (4.7 out of 5) against 366 for the chicken one (4.6 out of 5), so the evidence of owner experience is thinner.
- Both bags are large, 15 kg for chicken and 12 kg for fish on the listings. If a dog refuses the food you have a lot to use up.
- The fish listing's suggested four-day introduction is shorter than many owners and vets prefer.
Switching
Changing between the two swaps protein and carbohydrate at once. Most guidance suggests a week to ten days of gradual mixing, longer if stools soften. Our piece on how to switch your dog's food gives a schedule you can adapt. Persistent diarrhoea, vomiting or weight loss means a vet visit, not another change of food. This is general information and not a substitute for veterinary advice.
Choosing
Choose the Fresh Chicken if your adult large-breed dog does well on poultry and cereals, you want the better-documented, more widely rated recipe, and nothing in your dog's history rules out wheat or chicken.
Choose the Grain-Free Ocean Fish if chicken or grain needs to stay out, your dog is within the age and weight bands on the listing, and you are comfortable with a legume-and-potato base. Check the current price on Amazon for both, and compare cost by dividing the pack price by the days a bag lasts at your dog's feeding amount.
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