Hi Sarah, if he was on Zignatures all his life I would probably think it is fine, however he has only been eating it a year so I would please talk to your vet b/c Zignature is high up there with DCM. I understand about your dog with chicken, mine to can’t have chicken and what a battle it is to find a good grain in diet w/out chicken. I was feeding Holistic Select lamb and oatmeal, but I can’t use it anymore b/c he don’t like it and will starve before eating it. I might try Victor myself they have a beef and rice without chicken and a lamb and rice.
