If a dog has a heart condition, the best approach depends on the specific diagnosis and its severity, but there are several general steps that can help support heart health and quality of life. Follow the veterinarian's treatment plan Many heart conditions require ongoing monitoring and, in some cases, medications. Give medications exactly as prescribed and keep all follow-up appointments so the veterinarian can track changes in heart function. Maintain a healthy weight Excess weight makes the heart work harder. Work with your veterinarian to keep your dog at an appropriate body condition through balanced nutrition and portion control. Provide appropriate exercise Most dogs with heart disease still benefit from activity, but overexertion can be harmful. Ask your veterinarian what level of exercise is safe. In general: - Avoid intense or prolonged exertion unless specifically approved. - Watch for fatigue, excessive panting, coughing, or weakness during activity. - Allow plenty of rest. Feed a heart-healthy diet Depending on the condition, your veterinarian may recommend: - Limiting excess sodium. - Feeding a complete, balanced diet. - Using a prescription cardiac diet if appropriate. - Avoiding unapproved supplements or homemade dietary changes without veterinary guidance. Monitor breathing and symptoms Changes in breathing can be an early sign that heart disease is worsening. Contact your veterinarian if you notice: - Increased resting respiratory rate. - Persistent coughing. - Difficulty breathing. - Reduced appetite. - Fainting or collapse. - Marked lethargy or exercise intolerance. Many veterinarians recommend counting a sleeping dog's breaths per minute and tracking trends over time. Reduce stress and overheating Stress, extreme heat, and high humidity can increase cardiovascular strain. Provide a comfortable environment with access to water and cool resting areas. Keep up with preventive care Regular veterinary exams, dental care, parasite prevention, and management of other health conditions can help reduce additional strain on the heart.