[anonymous]

My dog with a sensitive stomach and environmental allergies (treated by a dermatologist) did well on Nutrisca salmon as a base, for years.
We are now using Zignature whitefish.
Both are available at Chewy dot com.
PS: Some dogs can switch foods with just minor reactions, such as loose or softer stools for two or three days, others may have diarrhea.
Only one way to find out.
Good luck