Multivitamin supplements, nutritional supplements, Co-enzyme Q10, and non-Western herbal supplements have all been used for heart disease treatment in dogs. Unfortunately, none have been examined critically to determine if they have potential to help or harm dogs with heart disease. At VCA we will always keep an open-mind and will work together with alternative therapy veterinarians to ensure that there are no adverse interactions between the traditional medications and the alternative therapies that may have been recommended by other veterinarians.