With this dog, we had to be careful what dog food she was placed on. She had guardia when we rescued her and it was a nightmare. She went through many dog foods due to her sensitive stomach. I finally kept her on grain free ingredients from Natural Balance. They have several and I can change them out so she won't get bored with the same dog food. She is also allergic to chicken but fortunately, Natural Balance has bison, lamb and this duck and others.