NHV Hearty Heart | Support for Heart Murmurs, Congestive Heart Failure (CHF), Heart Disease and Other Heart Conditions in Cats, Dogs & Pets All Natural, Vet formulated and vet approved. No preservatives or additives. Provide support for general heart health for cats, dogs and small animals. Boosts blood flow to your cat's, dog's and small pet's heart, while maintaining the required flow.