I suspect Piper may have an allergy or sensitivity to chicken. She seems to get sick every time I give her something with chicken in it. She recently had a severe GI reaction with loose, bloody stool after eating a pate with chicken as a main ingredient. She can definitely handle salmon, so I decided to find a salmon based limited ingredient food (Merrick) and go from there. How do you go about working back in other types of foods and does a chicken allergy necessarily mean an allergy to all poultry? I've never gone through this process, so I am trying to find out how to do it the right way. Thanks!