Kennel cough, medically known as canine infectious tracheobronchitis, is a highly contagious respiratory illness that spreads easily wherever dogs are in close contact, making boarding facilities, daycares, dog parks, and grooming salons common places for outbreaks. While most cases are mild and resolve on their own, kennel cough can cause a persistent, honking cough that’s distressing to hear and, in puppies, senior dogs, or dogs with weakened immune systems, can progress to more serious respiratory complications. Understanding how it spreads and what prevention steps actually work can significantly reduce your dog’s risk before, during, and after a boarding stay.
What Causes Kennel Cough
Kennel cough isn’t caused by a single pathogen but by a combination of bacteria and viruses that can act alone or together, most notably Bordetella bronchiseptica, canine parainfluenza virus, and canine adenovirus. This is part of why no single vaccine offers complete protection, since a dog vaccinated against one component can still catch a version caused by a different bacteria or virus circulating in the group.
The illness spreads through airborne respiratory droplets from coughing and sneezing, direct nose-to-nose contact, and contaminated surfaces like shared water bowls, toys, and bedding. Because dogs can shed the pathogens for one to two weeks, sometimes longer, even before symptoms are obvious, it’s genuinely difficult for any facility to guarantee a completely kennel cough-free environment, no matter how strict their protocols are.
Vaccination Timing and What It Actually Covers
The Bordetella vaccine, available as an injectable, an oral formulation, or an intranasal spray, is the most direct preventive measure and is required by the vast majority of boarding facilities and daycares. Timing matters significantly: the vaccine needs time to build immunity, so it should ideally be given at least a week to two weeks before a boarding stay, not the day before drop-off. Intranasal and oral formulations tend to build localized immunity in the respiratory tract faster than injectable versions, which is part of why many facilities prefer or require them specifically.
It’s worth understanding that the Bordetella vaccine reduces the severity and likelihood of illness but doesn’t guarantee complete immunity, since kennel cough can be caused by strains or pathogens outside the vaccine’s specific coverage. Combined with the standard DHPP vaccine, which covers canine adenovirus and parainfluenza, two other kennel cough contributors, a dog’s overall protection is meaningfully improved even if it isn’t absolute.
What to Look for in a Boarding Facility’s Protocols
Reputable boarding facilities take several concrete steps to reduce transmission risk, and asking about these directly is a reasonable and welcome question for any facility to answer. Look for a facility that requires proof of current Bordetella vaccination for every dog boarded, not just a general policy that’s loosely enforced, since one unvaccinated or under-vaccinated dog can introduce the illness to an entire group.
Good facilities also separate dogs by size and temperament rather than housing everyone together in one large group, clean and disinfect kennels, bowls, and communal areas thoroughly between stays, monitor dogs daily for early signs of coughing or nasal discharge, and have a clear isolation protocol for removing any dog showing symptoms from the general population promptly rather than waiting to see if it resolves on its own.
Steps to Take Before and After Boarding
Beyond vaccination, a few additional steps reduce your dog’s overall risk. Avoid boarding a dog that’s already showing any signs of respiratory illness, even mild ones, since this puts other dogs at risk and typically isn’t allowed by responsible facilities anyway. If your dog has a known history of chronic respiratory sensitivity, discuss additional precautions with your vet before a stay, and consider a facility with smaller group sizes or private housing options if your dog is particularly vulnerable.
After a boarding stay, keep an eye on your dog for the following one to two weeks, the typical incubation window, watching specifically for a dry, honking cough, sometimes triggered by excitement or pressure on the throat from a collar, along with any nasal discharge, low appetite, or lethargy. Using a harness instead of a collar for walks during this window can reduce coughing triggered by throat pressure if symptoms do appear.
What to Do If Your Dog Develops Kennel Cough
Most cases of kennel cough resolve within one to three weeks with rest and supportive care, similar to how a human cold typically runs its course. Keep an affected dog away from other dogs during this period to avoid spreading the illness further, and contact your veterinarian if the cough persists beyond two to three weeks, if your dog develops a fever, appears lethargic, stops eating, or shows any labored breathing, since these can indicate a secondary infection like pneumonia that requires more active treatment, sometimes including antibiotics.
Frequently Asked Questions
How soon before boarding should my dog get the Bordetella vaccine?
Ideally at least one to two weeks before the stay, giving the vaccine enough time to build effective immunity. Getting it the day before or the same day as drop-off provides little to no protective benefit for that specific stay.
Can a vaccinated dog still get kennel cough?
Yes. The Bordetella vaccine significantly reduces the risk and severity of illness but doesn’t provide complete protection against every possible pathogen that can cause kennel cough symptoms.
Is kennel cough dangerous for healthy adult dogs?
For most healthy adult dogs, kennel cough is uncomfortable but not dangerous, resolving on its own within a few weeks. It poses more risk to puppies, senior dogs, and dogs with pre-existing respiratory or immune conditions, who should be monitored more closely.
How long is a dog contagious with kennel cough?
Dogs can shed the pathogens responsible for kennel cough for one to two weeks after symptoms resolve, and sometimes longer, which is why keeping a recovering dog away from other dogs for the full recommended period matters even after visible coughing stops.
Can kennel cough spread to cats or humans?
Bordetella bronchiseptica, one of the bacteria involved in kennel cough, can occasionally infect cats and, in extremely rare cases involving immunocompromised individuals, humans, though this is uncommon. Most kennel cough transmission stays within the dog population.