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My puppy has a grade 4 heart murmur. Is it serious? What to do?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed Medium (23 - 60lb) | Male | unneutered | 6 months and 2 days old | 22 lbs

My 5 month old very active sproodle puppy has been diagnosed with a heart murmur grade 4. He's booked for full heart work up treatment but my insurance won't cover it. I'm going out of my mind with worry, he has no other visible symptoms Im worried that even if I got the money he would need further work which might be thousands I'm so worried about him I don't know what to do

1 Answer

Most Helpful Answer

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Answered By Megan, DVM, CVA

Veterinarian

Published on February 18th, 2019

I would try not to get too worked up until you figure out exactly what is going on. Some dogs have heart murmurs at young ages but commonly will grow out of them. I would try to see what could be causing the murmur and see what they recommend. If they recommend something you cannot afford, ask them to give you other options that are within your budget. If Darwin is really active and acting like a puppy, he likely isn't bothered by his heart murmur. I would be hesitant to put him under anesthesia without a full cardiac echo (ultrasound) to find out exactly where the heart murmur is coming from. I hope this helps and I hope there is nothing too serious with that sweet baby's heart!

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