How long has this been going on? Because I have a dog with environmental allergies, I had good results, but, only after going to a veterinary dermatologist.
I thought it was the food too, tried all kinds of things with poor results, my dog is doing well now on ASIT allergen specific immunotherapy times 5 years.
Turns out she can eat most foods but does best on Zignature whitefish (before that Nutrisca salmon) as a base.
So, I would consider going to a specialist if her symptoms go on for more than a year (4 seasons) without significant relief.
Food allergies are rare, environmental allergies are usually the culprit.
