Hi, everyone above has given great advice and suggestions. I have two EB's with allergy issues, they are allergic to chicken, salmon, beef, and sensitive to corn and grains. They both showed many symptoms like itch paws, excessive licking, yeasty ears, goopy eyes, diarrhea, and hives, but they never had vomiting. It really is trial and error to find a food that they tolerate. I switched our guys food 4 times before I found one that worked, and even then they became allergic to beef after 2 years of being on it. They were on Fromms Beef Fritatta for 2 years and then started showing allergy symptoms. Dozer was a mess, he started to shed like crazy, had hives, his eyes were very goopy and red, he had yeasty ears, and he licked his paws excessively to the point that they were always soggy, and they changed colour. I switched them to Fromms Lamb and Lentil and they are doing well on this food, it isn't 100% perfect, they will still lick their paws sometimes, but no hives or other allergy symptoms. I may have to switch them again in the future if they become allergic to this food. It is always best to do a slow transition between food changes to avoid upset an upset tummy or diarrhea. it is best to do it over two weeks, start with 2/3 of the old food with 1/3 of the new food for a few days, then 1/2 of the old food with 1/2 of the new food, for a few days, then 1/3 of the old food with 2/3 of the new food, and then finally all new food. I would also find a good probiotic or add a couple of Tbsp's of plain yogurt to the kibble everyday to help boost his immune system and aid with digestion. Have you considered having him allergy tested to see exactly what he is allergic to? This will give you a list of his allergies and eliminate the guess work of trying to find out his allergies. I hope you find a food he can tolerate, and I understand that the process is frustrating. Please keep us updated.