Chicken fat should not be a problem. The way they render to get the fat seperated should leave just pure fat, no protein. Grains are a problem for some dogs, but others handle them just fine. Usually the problem is in how much grains are in something, not the fact that it’s grains. With gut issues, the problem is that grains can be inflamatory, so if the gut is already inflamed, you don’t want to make things worse by feeding something inflamatory. All you can do is keep trying different things until something works, and if that thing is grains, good, at least you found what works.
