There are two common forms of heart disease. Valvular disease is more common in smaller dogs, such as the Cavalier King Charles Spaniel. Heart muscle problems tend to occur in larger breeds, such as Dobermans. Omnicardio plus supports all aspects of heart health. It can be given before the development of a murmur (for high-risk dogs), to all dogs once a murmur has developed, and is safe to use alongside heart medications.