What are the symptoms of a dog with heart disease?

Many dog owners first notice subtle changes in their pet’s energy levels when heart issues start. A pup that once bounded to fetch the ball might now lag halfway across the yard, or stop to pant heavily even on mild days. These aren’t just signs of aging—they could be early hints that the heart isn’t pumping blood as efficiently as it should. Keep an eye on how quickly your dog recovers after walks, too; a longer-than-usual rest period might signal something more serious.

Coughing is another common symptom that’s easy to mistake for a cold or allergies. Unlike a typical kennel cough, which often sounds harsh and comes in fits, a heart-related cough tends to be softer and may happen more frequently at night or after your dog lies down. This is because fluid can build up in the lungs when the heart can’t circulate it properly, leading to irritation that triggers coughing. If the cough lingers for more than a few days, or if you notice any wheezing, it’s time to call the vet.

Changes in appetite and weight can also point to heart disease. Some dogs lose interest in food altogether, while others might eat normally but still drop pounds because their bodies aren’t absorbing nutrients well. On the flip side, fluid retention—often a result of poor heart function—can cause sudden weight gain, especially around the abdomen. A quick weekly weigh-in can help you catch these shifts early; even a 1-2 pound change in a small dog is worth mentioning to your vet.

It’s important to remember that in many regions, regular vet check-ups are part of responsible pet ownership, and some areas even have laws requiring preventive care for dogs. These check-ups aren’t just for shots—they let vets listen to your dog’s heart, check for murmurs, and run simple tests if needed. Skipping these visits can mean missing early signs of heart disease, which is crucial because treatments work best when started early. Don’t wait for obvious symptoms to act; proactive care keeps your dog healthier and aligns with local pet welfare guidelines.

Knowing these symptoms helps you be a more attentive owner, but always rely on a vet for a proper diagnosis. Heart disease in dogs can be managed with medication, diet changes, and lifestyle adjustments, but only if it’s caught in time. By staying alert to changes in your dog’s behavior and routine, and keeping up with regular vet visits, you can give your furry friend the best chance at a long, comfortable life. Your dog can’t tell you when something’s wrong—so it’s up to you to notice the clues.