Dog & cat health · Vet-reviewed guide

Kennel Cough Treatment: What Most Dogs Actually Need

That honking, hacking cough sounds awful, but most kennel cough clears up much like a human cold. The real skill is spotting the small number of dogs that need more than rest.

Quick answer: The starting point for kennel cough treatment is that most cases are mild and clear up on their own in one to two weeks with rest and supportive care. Kennel cough is usually viral, and there is no single cure-all drug for it.

Because it is most often viral, antibiotics do not help the typical case, which is why many dogs need comfort measures and time rather than medication. A vet may add a cough suppressant to help a dog rest, and will reserve antibiotics for the smaller number of dogs with a bacterial component, or those that are very young, very old, or otherwise at risk. What matters most is watching the trend: a dog that stays bright, eats well, and improves over the week is usually fine at home, while one that gets worse needs a vet. Never give human cough medicines without veterinary direction.

What kennel cough is

Kennel cough is the common name for canine infectious respiratory disease complex, a contagious infection of the airways caused by a mix of viruses and sometimes bacteria.¹ The classic sign is a sudden, harsh, honking cough, sometimes ending in a gag. Dogs usually pick it up where they mix closely with others, such as boarding kennels, daycare, shelters, or grooming, which is why cases rise around holidays and boarding season.

What actually helps: supportive care

For a mild case in an otherwise healthy dog, supportive care is the treatment:

• Rest. Keep activity low while the airways recover.
• Use a harness, not a collar. A collar presses on an already irritated windpipe and triggers coughing.
• Humidity. A humidifier, or letting your dog sit in a steamy bathroom, can soothe the airway.²
• Keep them away from other dogs. Kennel cough is very contagious for a couple of weeks.

Most dogs are clearly improving, if not fully recovered, after about a week to two.³

When antibiotics are and aren't the answer

This is where owners most often go wrong. Because kennel cough is usually viral, antibiotics do nothing for the typical case, and reaching for leftover or over-the-counter antibiotics does not speed recovery.² A vet prescribes an antibiotic, such as doxycycline, only when there are signs a bacterial infection is involved, when the cough is not settling, or when the dog is young, old, pregnant, or has another illness that raises the risk. That is a judgment for a vet to make after examining the dog. If your dog needs a prescription, our licensed veterinarians can review your dog and issue one when appropriate. See how our vet prescription service works.

A note on cough medicines

A vet may prescribe a cough suppressant to help a coughing dog rest and recover.³ Do not give human cough or cold medicines on your own, as several contain ingredients that are unsafe for dogs. Let a vet choose the medicine and dose.

When kennel cough is an emergency

Most cases stay mild, but call a vet promptly if your dog becomes lethargic, stops eating, runs a fever, breathes fast or with visible effort, or if the cough gets worse rather than better after about a week.¹ These can be signs the infection has moved into the lungs as pneumonia, which needs veterinary treatment. Very young puppies and frail senior dogs should be seen sooner rather than waited out.

Preventing it

A vaccine against Bordetella, one of the common bacterial contributors, is available and is often required by boarding and daycare facilities.¹ It does not cover every cause, but it reduces the risk and severity. Ask your vet whether it fits your dog's lifestyle.