Why Is My Dog Panting Heavily?
Veterinary references checked with PetHealth+ · Last reviewed June 2026
By the Global Animal Guide editorial team Veterinary references checked with PetHealth+ ( process ) Last reviewed Cite this page How we research & review
Heavy panting can be normal after exercise or heat, but panting at rest, with blue gums, or with collapse needs urgent vet care. Pain, heart disease, heatstroke, and anxiety are common causes.
Normal vs concerning
Dogs pant to cool down. After a walk or on a warm day, panting is expected.
When to worry
- Panting at rest without a clear trigger
- Pale or blue gums
- Coughing or breathing effort
- Recent heat exposure or enclosed car
Common causes
Pain, fever, heart failure, Cushing’s disease, anxiety, and obesity can all increase panting.
Related: Heatstroke in dogs · Why is my dog shaking?
Frequently asked questions
Is panting always bad?
No — cooling and excitement are normal. Resting panting without explanation needs a vet check.
Do old dogs pant more?
Senior dogs may pant from pain, cognitive changes, or heart/lung disease — have them assessed.
Can anxiety cause panting?
Yes — storms, separation, and vet visits commonly trigger stress panting.
When is panting an emergency?
Collapse, blue gums, extreme distress, or known heat exposure — go to emergency care.