Kennel cough is usually a mild, self-limiting illness that clears up on its own within one to three weeks. Most dogs need nothing more than rest, humidity, and a little comfort care at home. Antibiotics are typically reserved for cases that show signs of progressing to pneumonia, so the bulk of treatment focuses on managing symptoms while your dog’s immune system does the heavy lifting.
What Kennel Cough Looks and Sounds Like
The hallmark is a forceful, dry, hacking cough that sounds like your dog has something stuck in their throat. Some owners describe it as a honking noise. Between coughing fits, most dogs act perfectly normal: eating, drinking, playing. You may also notice mild nasal discharge or occasional retching after a cough, but energy levels and appetite generally stay intact in uncomplicated cases.
Home Care That Actually Helps
Since most cases resolve without prescription medication, home care is the frontline treatment. The goal is to soothe irritated airways and reduce coughing episodes.
Humidity: Moist air hydrates the respiratory passages, loosens mucus, and reduces the irritation that triggers coughing. Run a hot shower and let your dog sit in the steam-filled bathroom for 10 to 15 minutes, once or twice a day. A cool-mist humidifier in the room where your dog sleeps works well overnight.
Honey: A small amount of honey can coat and soothe an irritated throat. PetMD recommends keeping portions modest: a quarter teaspoon for small dogs (11 to 20 pounds), half a teaspoon to one teaspoon for medium dogs (21 to 50 pounds), and up to two teaspoons for large dogs (51 to 90 pounds). Honey is high in sugar, so it’s not ideal for overweight or diabetic dogs, and puppies under a year old should skip it entirely.
Harness instead of collar: A collar pressing against the trachea during walks will provoke more coughing. Switch to a harness until your dog has fully recovered.
Rest and reduced activity: Exercise and excitement make coughing worse. Keep walks short and low-key, and avoid roughhousing or fetch sessions for a couple of weeks.
Warm, soft food: If your dog seems reluctant to eat, slightly warming their food or offering softer meals can help. Hard kibble sometimes irritates a sore throat, while warmed food releases more aroma and encourages eating.
When Your Dog Needs Veterinary Treatment
Most dogs with kennel cough don’t need antibiotics. They become necessary when there’s evidence the infection has moved deeper into the lungs and pneumonia is developing. Watch for labored breathing, a wet or productive cough (rather than dry), high fever, thick nasal discharge, loss of appetite, or unusual lethargy. These signs mean the infection is no longer mild.
Puppies, senior dogs, and dogs with compromised immune systems are at higher risk of complications and may warrant a vet visit even with mild symptoms. The average veterinary visit for kennel cough runs around $260, based on recent insurance claims data.
Antibiotics
If your vet determines antibiotics are needed, treatment typically lasts 7 to 14 days. The specific antibiotic is chosen based on what’s causing the infection. Your vet may run a culture test from a tracheal sample to identify the exact bacteria involved, though in many cases they’ll prescribe based on the most common pathogens. You’ll likely be asked to give pills at home twice a day.
Cough Suppressants
Your vet may also prescribe or recommend a cough suppressant to give your dog relief from persistent hacking. Veterinary cough medications typically contain an expectorant to loosen mucus combined with a cough suppressant. These are not safe for puppies or kittens under three months old or animals weighing less than five pounds. Don’t give your dog human cough medicine without checking with your vet first, as many formulations contain ingredients that are toxic to dogs.
Keeping Other Dogs Safe
Kennel cough spreads easily through airborne droplets, shared water bowls, and direct contact. If your dog is infected, keep them away from other dogs for at least 14 days after their symptoms have fully resolved. That’s generally how long it takes for a dog to clear the infection and stop being contagious, according to Michigan State University. This means no dog parks, daycare, boarding, or group walks during the entire illness plus those two additional weeks.
At home, if you have multiple dogs, isolate the sick one as much as practically possible. Wash shared bowls, bedding, and toys. The bacteria and viruses that cause kennel cough don’t survive long on surfaces, but cleaning still reduces the risk.
Preventing Kennel Cough
A combination vaccine targeting the most common culprits (Bordetella bronchiseptica and canine parainfluenza virus) is available in three forms: intranasal, oral, and injectable. Research published in Frontiers in Veterinary Science confirmed that the oral combination vaccine provides protection for at least one year after vaccination. Most boarding facilities and doggy daycares require proof of vaccination before admission.
The vaccine doesn’t guarantee your dog won’t get kennel cough. Multiple viruses and bacteria can cause the illness, and no single vaccine covers all of them. But vaccinated dogs tend to get milder cases that resolve faster. If your dog regularly visits places where dogs congregate, annual vaccination significantly lowers the odds of a bad bout.