I’ve tried various heart supps for my 3 dogs with heart murmurs and one with heart failure. Researched a fair bit to determine key Ingredients that make a difference, and fera pet’s has the highest dosage of L-carnitine and taurine. I feed a separate COQ10 product. I sprinkle the powder on their food, no rejection from them so that’s good. Will keep buying. I have always ordered this from the US so I was thrilled when Shop the Paws brought it in. They have been very efficient with delivery and communication. Thank you!