My 8yr old Collie is coeliac and so is grain free. But, last year he began to itch quite badly and lost weight and condition. We had this a while ago with another food which became wet eczema and required treatment. I bought Fish4Dogs large to try to relieve this latest itching but it got worse!. Then I realised it could be whatever is used to bind these products into chunks. So I tried the small. And it has worked!! My dog is well and fit again. It’s a relief for us both. Lesley Reed and Colin the Collie.