Suggestions for chicken AND beef free food

Hiya! I have a mutt mix who has been on the Nutrisource Grain free diet for years now. Recently our vet suggested getting off the grain-free and suggested either Purina Pro Plan, Hill's Science diet, and Royal Canin. I have personal reasons for not liking the first two brands so I'm avoiding them. Dog also has an allergy to beef and chicken. Looking for more suggestions OR brands to avoid. I was looking at fresh food from places like Farmer's dog but I can't find info that they actually meet WSAVA guidelines so any suggestions there are also preferred.

Clarifying things: I do trust the vet, just not most of their partnered brands. Dog is female 68lbs.

Thanks in advance and I hope everyone's pups are doing great