Pollock is a lean white fish from the cod family, caught mainly in the North Pacific, and it is safe and useful in a dog's diet when cooked and deboned. It is mild, low in fat, low in mercury and rich in complete protein, which is why it appears in a great many fresh and wet dog food recipes.
What Alaska pollock actually is
Alaska pollock, sometimes written walleye pollock, is a member of the cod family found across the North Pacific. It is one of the largest wild caught fisheries on earth by volume, and most of the white fish that Americans eat without thinking about it, from fish sticks to fast food fillets to imitation crab, is pollock.
The flesh is white, flaky, low in oil and very mild in flavour. That last quality is the commercial point. Pollock does not taste strongly of anything, which makes it an easy base to build other flavours on, and an easy protein for a cautious eater to accept.
It should not be confused with Atlantic pollock, a different and darker fleshed species. When a dog food names Alaska pollock specifically, it is telling you which fishery it came from, which is more information than most labels bother to give.
Why it turns up in so many recipes
Three reasons, and none of them are marketing.
Supply. The Alaska pollock fishery is enormous and consistently managed, so the ingredient is available in volume at a stable price. Formulators can build a recipe around it and still be making it in three years.
Leanness. White fish gives a formulator protein without much accompanying fat, which leaves room to set the fat level deliberately using an added oil rather than accepting whatever came attached to the protein. That is a useful degree of control.
Mildness. Strong flavours narrow a product's audience. A mild fish widens it, and in a category where a rejected meal means a cancelled subscription, palatability is not a trivial concern.
What it contributes
Complete protein, meaning all the amino acids a dog requires, in a highly digestible form. Fish protein is generally well digested by dogs.
Iodine, selenium, phosphorus, and vitamin B12. Marine fish are a meaningful dietary iodine source, which is relevant because iodine has a narrow useful range in dogs.
Some omega 3 fatty acids, but fewer than people assume. Pollock is a lean fish, and EPA and DHA travel with fat. A recipe wanting a substantial omega 3 contribution usually adds salmon, fish oil or algal oil on top of the white fish rather than relying on the white fish alone.
What naming the species tells you
The My Perfect Pet Fish Blend names Alaska pollock in its live product data, alongside haddock and salmon, plus broccoli, green beans, sweet potatoes and dried kelp. Three named species in one recipe is unusually specific labelling, and it tells you that the white fish component is not a floating category that changes with the market. What the product page does not publish is how much of the recipe each fish accounts for, and that is not something to estimate from ingredient order. The FDA's guidance on complete and balanced pet food explains what the adequacy statement on such a product does and does not cover.
Feeding pollock at home
If you are cooking pollock for a dog rather than buying a recipe that contains it, three rules cover most of the risk.
Cook it. Raw fish can carry parasites, and in the Pacific Northwest raw salmonid fish specifically can carry the organism responsible for salmon poisoning disease, which is serious. Cooking removes that risk entirely. Poach or bake, do not fry.
Debone it. Small fish bones are a genuine hazard and are not softened by cooking.
Leave it plain. No salt, no butter, no garlic or onion. Garlic and onion are toxic to dogs, and a seasoned fillet is a different food from a plain one.
Keep home cooked fish to an occasional addition rather than a meal replacement, and count it toward the day's calories. A complete diet is balanced as a whole, and adding a large quantity of any single food to it undoes some of that balance.
Frequently asked questions
Is pollock safe for dogs?
Yes, when it is cooked, deboned and unseasoned. Pollock is a lean, mild, low mercury white fish that is well tolerated by most dogs and widely used in commercial dog food. Raw fish should be avoided because of parasite risk, and fried or seasoned fish should be avoided because of the fat, salt and any onion or garlic involved.
Does pollock contain much mercury?
No. Pollock is consistently among the lowest mercury fish measured, because it is small, short lived and low on the food chain. It is one of the species regularly recommended for frequent consumption in human dietary guidance, and the same reasoning applies to dogs.
Is pollock a good source of omega 3 for dogs?
Only modestly. Pollock is a lean fish, and the long chain omega 3 fats EPA and DHA are carried in fat. It supplies some, but a recipe aiming for a meaningful omega 3 contribution will normally include salmon, fish oil or algal oil as well. Check the ingredient list rather than assuming white fish covers it.
Can dogs eat imitation crab, since it is made from pollock?
Best avoided. Imitation crab is pollock surimi combined with starch, sugar, salt and flavourings, and the additives rather than the fish are the problem. A small piece is unlikely to harm a healthy dog, but it is a poor way to feed fish. Plain cooked pollock does the same job without the extras.
How often can a dog eat fish?
As a complete diet, every day, provided the recipe carries a complete and balanced adequacy statement for the right life stage. As a home cooked addition to another diet, occasional small amounts are sensible, counted toward daily calories so the main diet stays in proportion.
Related reading: Haddock for Dogs: A Mild White Fish Worth Knowing and How to Compare Fish Based and Poultry Based Fresh Recipes.