When I was taking Ivy to the vet for her seizures the vet mentioned food allergies as a main culprit in seizures. This list is compiled by Dr Alfred Plechner DMV a food allergy expert. The foods may surprise you and they are listed in order of high sensitivity to lowest. I am feeding Ivy foods from the lower end of the list or not on the list like venison, rabbit, duck etc.
Beef and beef by-products
Milk
Yeast and brewer's yeast
Corn and corn oil
Pork
Turkey
Eggs
Fish and fish oils
Wheat and wheat by-products
Soybean
Chicken