See I was thinking it might be the grains- but the dog food she is on now is grain free. I was trying to find a dental bone for her today and ended up with just a bully stick because I didn't know what to get. Standing there I had a thought that she might be allergic to wheat or gluten. What do you use for dental bones for your dog? She has about half the bag left- if she is allergic, how long will it take to hopefully see less itchiness?