If you are dealing with environmental allergies vs food sensitivities, or both.
It’s best to go with a limited ingredient dog food.
My dog with environmental allergies does best on Nutrisca salmon and chickpea (no grains, no potato). Potato seems to bother a lot of food sensitive dogs.
However, as my dog continues to have a positive response to immunotherapy (2 years) I have observed that she is able to tolerate more of a variety of foods.
So, in my opinion, I would stay with limited ingredients, no grains.
PS: If the dog is reacting to environmental allergies, most of which are airborne, no matter what you feed him he will have the symptoms you described. That has been my experience.
Have you tried frequent bathing, at least once a week? Malaseb and GNC Pets Medicated Anti-Bacterial & Anti-Fungal are my favorites.
