I am sorry to hear of Duncan. There is a lot you can do to help. The
cardiologist is your first call for sure, they'll tell you the stage and give
Duncan medication he needs to help his heart, and maybe something to help
control fluid build up if he is in heart failure. They will assess his risks
and start treatment. My little BSH Trixi was diagnosed with this condition at
12 weeks old. She is 7 years old this August, despite being given a few
months to live at the time.
Start CoQ at 30mg. All my HCM cats take it. Its a food supplement which
helps the heart. Most cats here are on it, but you can't stop it suddenly.
It's available as Vetriscience Cardiostrength for cats or the health food
You need to learn Duncan's breathing. When he is asleep, count his breaths
over 15 secs, times by 4. Find what looks normal and is normal for him.
Watching for changes can quickly tell you if he is starting to enter heart
failure. Up to 30 breaths is normal, 30+ alarm and 40+ generally an emergency.
[Non-text portions of this message have been removed]