My dog coughs once in a while. When he does it sounds like a forceful exhale as if he coughed something up to swallow it. He only coughs once and it kind of sounds like food is stuck in his throat. I never though much of it since he doesn't chew his food, and I thought coughing it up was what he was doing. Just so I know, can anyone describe in detail what a cough associated with heart worm sounds like? The web describes it as a soft, dry cough, but exactly what does that mean? I've tried looking at YouTube videos, but I'm not exactly sure what I'm looking at.