How serious is a grade 3 parasternal heart murmur in kittens?
My family adopted a 3-month-old Turkish Angora with a heart murmur. The shelter said they usually go away as they get older; they had been monitoring it with their vet. His papers mentioned it was a grade 3 parasternal heart murmur. Is this something we should be worried about? What should we keep in mind while raising him and what should we look out for?
He plays a lot and is very active and vocal. He sometimes overworks himself with playing (we try to avoid that) and breathes heavily when that happens. Once he panted for about 3 seconds and stopped.
Thank you in advance.