I'll often suggest trying the food allergy elimination diet route initially, and if symptoms and problems persist, I then recommend testing. (maryvancenc.com)
My dog recently finished a food allergy elimination diet trial with this food. (royalcanin.com)
For dog food skin allergy an elimination diet is used where the diet is paired back to a simple protein and carbohydrate such as chicken and rice. (dog-health-guide.org)