I need to change my dogs food due to potential allergies (he broke out in an itchy rash and we think it's related to his food). We've looked for dog food made for sensitive skin and it is SO expensive it's ridiculous. Any suggestions? I might consider just cooking his food, since I cook the rest of the families anyway, but I want to be sure he's getting everything he needs and I can't go spending an arm and a leg. Help!!