Every once in awhile my cat has a sort of cough-sneeze thing that he does that concerns me. It sounds like a reverse sneeze or a wheeze that i've heard short-snouted dogs do. I've talked to my vet about this and she just thinks it's allergies but it's winter and he still does it! He does have a mitral valve deficiancy and my concern is that it might be heart related. Any ideas?

