I have three field breed Gordon Setters, two come from Springset Kennels. I had them on PROPLAN, directly from my vet but they had skin problems and their coats were coarse and dull. I switched them to INNOVA EVO and within a month all skin problems went away (probably grain allergies as PROPLAN is considered good dog food by most)...the most obvious difference was there coats. They turned very shiny and smooth.

Innova is very expensive but it has paid for itself in the reduction of visits and medicince associated with the vet.