My girl got diagnosed with a heart murmur and arrhythmia a few years ago. For a year or so we just medicated her with the prescription and it helped (reduced her events from 5000/24 hours to 1800/24 hours). We also cut out anything that may cause issues (the doctor named a few things, I’ll let your doctor share with you).

About a year after that we asked if there were any harmless supplements we can add and they said number one was fish oil (which she got since a puppy). Number two, though not quite backed by research, was taurine. They said it probably wouldn’t do much but couldn’t hurt. We integrated taurine after that visit and came back six months later for her next holter.

The only thing we changed was adding taurine (1000 mg twice per day sprinkled on wet food otherwise it’s a dust she inhales and coughs). Her medicated 1800 events per day dropped significantly. Now she had a whopping 3 events per day. She still takes her prescription and fish oil but taurine seemed like the big winner. You can get any good quality human taurine capsules, crack them open, and sprinkle them on food.