How to Spot Heart Disease in Dogs Early

October 13, 2025

Your dog’s heart works just as hard as your own and like humans, dogs can experience a range of heart conditions, especially as they get older. Southill Vets’ Bob O’Brien has pulled together some advice for pet owners in Wincanton on how to look after your dog’s heart. With the right care and attention, heart problems can be managed or even prevented in some cases. Here’s what to watch for, and how to keep that tail wagging for years to come.

In its early stages, canine heart disease can be difficult to detect, so an annual check-up (or screening if your dog’s breed is more prone) is important – if your dog is due a check-up then contact us to book. 

You may also want to download our factsheet on Spotting Heart Disease in Dogs at Home.

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Common heart conditions in dogs

Bob explains that although some dog breeds are more prone to heart problems than others, heart issues can affect dogs of any age, size, or lifestyle. The most commonly seen conditions include:

– Mitral valve disease (MVD):

A degenerative condition affecting the valve between the heart’s chambers. Most common in small breeds such as Cavalier King Charles Spaniels.

– Dilated cardiomyopathy (DCM):

A disease that causes the heart muscle to weaken and enlarge. More often seen in larger breeds like Dobermans and Great Danes.

Spotting signs early

Heart disease can develop gradually, so the symptoms aren’t always obvious at first. Common signs of heart disease in dogs to look out for include:

  • Tiring easily during walks or play
  • Coughing, especially at night
  • Reduced appetite
  • Fainting or collapsing
  • Fast or laboured breathing
  • A swollen belly

Read more about these signs, and others, in detail in our Dog Heart Factsheet.

If you notice any of these, make sure you book a check-up with our vets in Wincanton as soon as possible.

Looking after your dog’s heart

While not all heart conditions can be prevented, Bob reveals that good daily care and early intervention can make a huge difference:

  • Keep your dog a healthy weight – Excess weight puts extra strain on the heart.
  • Stick to regular vet check-ups at Southill Vets – This helps catch problems before they become serious.
  • Exercise sensibly – Daily walks are great but it’s best to adjust activity levels if your dog starts to show signs of fatigue.
  • Feed a heart-healthy dietOur vets can recommend food that supports cardiovascular health.

Caring for your dog’s heart means giving them the best chance at a full and happy life. If you’re ever in doubt, just ask our team at Southill Vets – we’re here to help.

Call to book an appointment 

 

Plus, remember to download our factsheet on Spotting Heart Disease in Dogs at Home