Based on the history you provided, the following are the most likely causes for your cat’s trouble breathing. Again, we cannot emphasize enough that trouble breathing is a medical emergency and a veterinary visit is recommended ASAP. If you still seek further information, please visit our
Ask The Vet page to submit a one on one consultation with a licensed veterinarian 24 hours a day, 7 days a week.
Congestive Heart Failure
Feline Herpes Virus
Complications from heart murmur