What this means
Dogs pant naturally after exercise, because that is how they cool down. It is worth being concerned when the panting seems too heavy for the small effort, lasts unusually long, is noisy, or when your dog seems to have lost the stamina to cover a distance it once managed easily. It can develop gradually, so an owner often notices it only by comparing with how the dog was six months or a year ago.
Heavy panting after little effort can have very different causes: extra weight, problems of the heart, lungs or airways, muscle or nerve weakness, a metabolic problem, or heat. Only a vet who examines the dog can tell them apart, so there is no need to guess at home.
Note down after what kind of effort your dog starts to pant, how long it takes to settle, whether the breathing is noisy, and whether the gums stay pink. Notice whether your dog tires quickly, limps, has weak legs, has developed a cough, or has changed in weight or appetite. You can film the breathing so the vet can see it.
Possible causes
These are things that can cause this sign. It is not a diagnosis, and they are not equally likely for your dog.
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Extra body weight
Extra weight makes moving and breathing harder, so the dog tires quickly. Panting after exercise is heavy and does not ease for a long time.
About the condition: Obesity -
A heart or lung problem
When the heart or lungs work less well, even a small effort becomes hard. A cough or faster breathing at rest may also appear.
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Nerve or muscle weakness
When the leg muscles or nerves weaken, moving takes more effort. The dog may breathe loudly, tire quickly or limp.
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A metabolic disorder
When muscles do not get enough energy, the dog tires fast and pants hard after a small effort. It is seen more often in young dogs.
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Narrowed or disturbed airways
Narrow or disordered airways make breathing harder, especially on a hot day. The breathing may be noisy or rasping.
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Heat or a change in health
A warm day, excitement or pain can make panting heavier. If it is unusual and keeps happening, it is worth checking.
What else to watch for
These observations help your vet build the picture faster. Note down what you saw and when.
- After what kind of effort your dog starts to pant
- How long it takes to settle
- Whether the breathing is loud, noisy or rasping
- Whether the gum colour stays pink
- Whether your dog tires quickly, limps or has weak legs
- Whether a cough, or a change in weight or appetite, has appeared
When to book a routine visit
If your dog regularly pants hard after light exercise or it began recently, note down your observations and book a vet visit. Say when you noticed the change and after what effort.
Related conditions
Conditions whose entries mention this sign. The list is somewhere to read on, not a way to reach a diagnosis.
- Adult-onset neuropathy Nerves and muscles This is an inherited disease of the peripheral nerves that appears once a dog is already an adult: the nerves carrying signals from the spinal cord to the leg muscles gradually weaken. As a result the muscles receive ever weaker signals, waste away, and the dog finds it harder to control its legs. The disease progresses slowly, so the first changes are easy to mistake for tiredness or old age.
- Obesity Hormones and metabolism Obesity is a condition in which too much fat builds up in a dog's body. The extra weight strains the joints, heart and breathing, raises the risk of diabetes and other diseases, and makes it harder for the dog to move and enjoy an active life. Weight creeps on gradually, so it is easy for an owner to miss, and a vet can help assess the dog's body condition.
- Pyruvate dehydrogenase deficiency Hormones and metabolism This is an inherited metabolic disorder in which the body's cells lack an enzyme that helps turn sugar into energy. The muscles run out of strength quickly and lactic acid builds up in the body, so even ordinary exercise can become too much for the dog. It shows up at a young age, and whether it is behind a dog's weakness is for a vet to decide.
Body systems: Nerves and muscles Hormones and metabolism