My guinea pig, Gizmo, is coughing. At least it sounds like a cough. Do they cough? I've heard it for about a week now, but did not know what pig it was coming from. Well, today I took Gizmo out of the cage, and when I was putting him back in he did it. He is doing everything as he normally does. I do not believe he has lost weight, but then again I do not weigh my pigs like I should. He is a ham! LOL. Does this sound like something I should make a vet appointment for? Thanks.