Have you tried the the prescription royal canin limited ingredient? they have potato and duck, potato and venison, potato and whitefish, and potato and rabbit.
i think, back when i worked for a general practice in 2004-2006 ish, this food was made by a company called IVD (bought out by royal canin) and the vet i worked for prescribed it for IBD patients.
__________________ Kellie  and  Morgan |