Hi have you looked at “Lupo Sensitive 24/10” or “Lupo Natural Swiss Chicken” I don’t know if he can have potato flour, Lupo uses potato flour, normally when a dog has a allergy to a food its the protein in say the potatos or meat that they are allergic or intolerant too… here’s Zooplus site just put the “Lupo Natural Swiss Chicken” in the Search bar if you want to have a look at the Natural Swiss Chicken….here’s the link too Lupo Sensitive 24/10 http://www.zooplus.com/shop/dogs/dry_dog_food/luposan/lupo_sensitive/304149
Another kibble is “California Natural Lamb & Rice” large bites it has just 4 ingredients you can always add a topper some sardines etc http://www.californianaturalpet.com/products
