Something that I kept in the back of my mind, but never had to do, was RAST testing or skin testing for allergies
. I managed to
work with her, her whole life, without having to
the expense and trouble of that. But I would have, if I had had to. I did notice that she did not tolerate red meat or wheat in her diet, after the first few years of her life. You might try to see, by process of elimination, if there are any food triggers for your dog.