Q. My dog has grade 4murmur and tonight he has like an allergy weezing almost like choking
DR. CHRISTIE LONG, D.V.M., C.V.A.
A. I'm very worried that your dog could be exhibiting signs of congestive heart failure. We can often hear a murmur long before we see signs of congestive heart failure. While it's technically possible that this is allergy-related, my first thought would be to look for worsening heart disease and start medications. I urge you to get your dog to a vet as soon as possible because if this is an acute respiratory crisis your dog could get into trouble very quickly.