I have a 10 mo old (rescue got him last month) collie mix who has a sensative stomack, sensative skin and a picky personality!! He refuses to eat anything with rice in it!! Making food for him I also found out he hates mashed potatoes! LOL. I would prefer to give him a store bought food rather than homemade though. The vet has recomended I put him on a Rx formula, but dread paying so much for food he refuses to eat. Any suggestions that wont break the bank??