Dogs can get kennel cough at home when they breathe in virus or bacteria particles that an infected dog left in the air or on shared objects, even if they never set foot in a kennel.

What kennel cough is

Kennel cough is a contagious respiratory infection that irritates a dog’s windpipe and voice box, often causing a harsh, hacking cough that can sound like something is stuck in the throat. It is usually caused by a mix of germs, especially the bacterium Bordetella and respiratory viruses like canine parainfluenza or adenovirus.

How dogs catch it at home

Even at home, dogs can inhale infectious droplets in the air or pick up germs from contaminated surfaces.

  • Direct contact with a visiting or family dog that is coughing or is a silent carrier.
  • Indirect contact via shared bowls, toys, bedding, crates, car seats, or furniture that a contagious dog used within the last couple of days.
  • Airborne particles brought in from places like dog parks, daycare, groomers, training classes, vet waiting rooms, or dog-friendly cafés, then carried on clothing, hands, or leashes.

Why it happens even without recent boarding

The name “kennel” cough is misleading, because many infected dogs never go to kennels.

  • The germs spread quickly anywhere multiple dogs mix, then your dog brings them home before showing symptoms (incubation is often 2–14 days).
  • Some dogs shed the infection for weeks or months without looking sick, so a seemingly healthy visitor dog can still infect your pet.
  • Stress, cold air, smoke, dust, or poor ventilation in the house can weaken your dog’s natural airway defenses and make infection more likely.

Red flags and when to call the vet

Most healthy adult dogs recover in one to three weeks, but some can get secondary infections like pneumonia.

  • Common signs: dry or honking cough, gagging after coughing, sometimes mild sneezing or a runny nose.
  • Call a vet urgently if there is fever, listlessness, breathing difficulty, loss of appetite, or if a puppy, senior dog, or dog with heart/lung disease starts coughing.

Home prevention tips

You cannot reduce the risk to zero, but you can lower it at home.

  • Ask your vet about the Bordetella/kennel cough vaccine, especially if your dog goes to daycare, parks, groomers, or boarding.
  • Avoid sharing bowls and toys with visiting dogs and clean commonly used items regularly.
  • Keep your dog’s space well ventilated and avoid cigarette smoke, heavy dust, and harsh cleaning fumes.
  • If your dog starts coughing, keep them away from other dogs until your vet says they’re no longer contagious, which can be around two weeks or more.

Bottom note: Information gathered from public forums or data available on the internet and portrayed here.