I once talked to my TCVM vet about cardiac supplements (hoping to prevent any cardiac issues in my beloved Cavalier) and he recommends Standard Process Canine Cardiac Support, but only if a dog has a heart condition that necessitates it ~ rather than for prevention. You have to buy it from an approved Standard Process veterinary supplier. Check for a supplier near you here: https://www.standardprocess.com/HCP-Search
Here’s a link for the product: https://www.standardprocess.com/Products/Veterinary-Formulas/Canine-Cardiac-Support
