[anonymously]

I don’t know what you mean by “skin allergies”. Perhaps you mean environmental allergies.
If your dog has a sensitive stomach or food sensitivities, he may do well on Nutrisca Salmon and Chickpea, as a base. My neighbor has a Cavalier mix with a sensitive stomach that does well on Fromm products.

PS: Use the search engine here to look up “allergies” for more info.