My Husky is a rescue. He was abused before we got him and he was around 3 years old at that time, hes 8 now. Since we got him, he has had a near constant cough that sounds like phlegm moving, vomits and dry heaves frequently, and has frequent bouts of diarrhea. He has been tested for heart worms, kennel cough, and heart disease among other things. Nobody seems to know whats wrong. Some days hes lethargic but most of the time, he has energy to spare. We have tried grain free food. Nothing works.