Hi, I give canned pink salmon in addition to Eukanuba Fish and Potato to my allergy dog and everything stays calm and the skin is good and elastic and the coat very shiny, while living in Denmark I noticed the lustrous coats on many breeds and a favorite dog treat there is dried herring and sardines, stinks to high heaven but the dogs love it.
I agree with Susan that some dogs may have special requirements but if a dog has perpetual skin and coat problems then a full thyroid panel needs to be done. While the Berner tends to be on the low side of normal there are dogs that have clinical signs of dysfunction and need to be supplemented and checked regularly. Rose T.