A night cough in a senior dog often points to heart disease, a collapsing trachea or chronic bronchitis. How to tell them apart, emergency signs, and what to do tonight.
A senior dog coughing at night is most often a sign of heart disease, a collapsing trachea, or chronic bronchitis. A new cough in an older dog should always be checked by your vet. Fast breathing at rest, pale or blue gums, or collapse means go to the emergency vet now.
Quick pick (#ad): if your dog walks on a collar, switch to a harness that keeps pressure off the throat, such as the Ruffwear Front Range Dog Chest Harness (back leash ring, foam-padded chest) or the step-in Gooby Comfort X Step-in Lite Harness (deep V-neck). A harness does not treat the cause, so see your vet about any new cough.
This guide covers the five most common causes, how to tell them apart at home, and what to bring to the vet.
1. Heart disease. In older small dogs, a leaky mitral valve is the classic cause. VCA Animal Hospitals notes that mitral valve insufficiency accounts for about 80% of congestive heart failure cases in dogs. Fluid backs up into the lungs, and the cough is often worse at rest or during sleep. 2. Collapsing trachea. The windpipe's cartilage rings weaken and flatten. The sound is a dry "goose honk." It gets worse with excitement, heat, humidity, eating or drinking, and pulling on a collar. 3. Chronic bronchitis. The airways stay inflamed and sensitive. Vets usually call a cough chronic when it lasts two months or longer. 4. Heartworm disease. Worms in the heart and lung vessels block blood flow. It is preventable with monthly medicine. 5. Lung tumors or masses. Less common, but more likely with age. Only an X-ray can rule this in or out.
Soft, moist cough at rest or in sleep, with faster breathing: more likely heart disease.
Loud, dry goose honk after excitement or collar pressure: more likely a collapsing trachea.
Hacking cough most days for 2+ months: more likely chronic bronchitis.
Cough plus tiring fast on walks: think heart or heartworm disease.
This is a guide, not a diagnosis. Many senior dogs have more than one problem at once.
Count the sleeping breathing rate. Count one rise and fall of the chest as one breath, for 30 seconds, then multiply by 2. Most vets want a sleeping rate under 30 breaths per minute. Write it down every night. A rising number is worth a call. Related: heart disease in senior dogs: early warning signs.
Film the cough. Coughs often stop at the clinic. A 20-second phone video helps your vet tell a goose honk from a heart cough.
Switch to a harness. VCA recommends a harness instead of a collar for dogs with a collapsing trachea, so there is no pressure on the neck.
Cut irritants. No smoking near your dog, and skip strong sprays and scented candles in the bedroom.
Keep weight in check. Extra weight makes breathing and tracheal collapse worse.
Do not give human cough medicine. Some contain ingredients that are toxic to dogs. Ask your vet first.
Expect a listen with a stethoscope, chest X-rays, and often a heart ultrasound, blood work and a heartworm test. With proper treatment, VCA notes many dogs with heart failure live a normal life for many months to years.
No. It is common, but not normal. A new night cough in a senior dog is worth a vet visit, because heart disease is a frequent cause.
When the heart leaks, fluid can build up in the lungs, and lying down makes it harder to clear. That is why a cough at rest or during sleep points toward the heart.
A loud, dry honk, like a goose. It often follows excitement, drinking, or pulling on the leash.
Not without your vet. Many human products are unsafe for dogs.
Sources: VCA: Congestive Heart Failure in Dogs, VCA: Tracheal Collapse, Lap of Love: Senior Pet Coughing.
Educational only, not a substitute for your veterinarian. As an Amazon Associate we earn from qualifying purchases.
Shop related senior dog essentials
Affiliate disclosure: SILVERPAW is a participant in the Amazon Associates Program. As an affiliate of ILYESHOPI LLC, we earn a commission from qualifying purchases at no extra cost to you. We only recommend products we believe help senior dogs. Prices, ratings, reviews, and stock are confirmed on Amazon.