Two things surprise people about kennel cough. How much lead time the vaccine needs depends on which form your dog gets, and it reduces severity without covering every bug that causes the cough. A dog is also contagious before the cough starts. If you are boarding over the holidays, the useful work happens now.
Why the Marina District makes this a local problem
Kennel cough is not really about kennels. It spreads wherever dogs share air and surfaces, and this neighborhood is about as dog-dense as San Francisco gets. Marina Green, the Presidio paths, the sidewalk tables on Chestnut, daycare, grooming, training classes, the elevator in a dog-friendly building: all of it is contact.
Boarding gets the name because a facility concentrates a lot of dogs from a lot of households for several days, which is exactly the condition the organisms want. But a dog who never boards can pick it up at the park, and often does.
The seasonal part is simple. Holiday travel means facilities run full, bookings are made weeks ahead, and dogs who normally see three familiar dogs a week suddenly share a building with thirty.
What kennel cough actually is
It is not one thing, which is the single most useful fact in this article. “Kennel cough” is a label for a cluster of contagious respiratory bugs that produce a similar cough, and a given dog may have more than one at once.
The usual suspects include a bacterium called Bordetella bronchiseptica, canine parainfluenza virus, canine adenovirus type 2, a canine respiratory coronavirus, mycoplasma organisms, and canine influenza. They are not the same, they are not all covered by the same vaccine, and that is why a vaccinated dog can still cough.
Spread is by aerosol over short distances, by direct nose-to-nose contact, and by shared surfaces: bowls, toys, bedding, hands and a kennel wall. Incubation is usually three to ten days, and a dog is shedding before the cough appears, which is why outbreaks move faster than anyone expects.
What it sounds like, and what owners usually call it instead
The classic cough is harsh, dry and honking, often in bouts, and it frequently ends in a retch or a gag that produces a little foam. That final retch is the reason most owners arrive describing something else entirely: they think the dog is choking, or has something stuck, or is vomiting.
If you are not sure, the useful details are whether the cough is dry and repeated, whether it ends in that gag, and whether anything actually comes up. Filming a bout on your phone is worth more than any description, because dogs reliably refuse to cough in the exam room.
Most otherwise healthy adult dogs get a cough that runs one to three weeks and clear it themselves with rest. That is genuinely the common outcome, and it is why the article is mostly about the exceptions.
When a cough stops being routine
Come in rather than waiting if any of these apply:
- The dog is under six months or over about ten. Puppies and older dogs have less reserve and are the ones most likely to get worse rather than better
- A short-nosed breed. Bulldogs, pugs, Boston terriers and French bulldogs start with a compromised airway and cope badly with anything that narrows it further
- Any ongoing health problem, particularly heart or airway
- Lethargy or a dog who is off food. This is the line between an irritating cough and something spreading into the lungs
- Fast or labored breathing, or breathing with an open mouth at rest
- A cough that has turned wet or productive rather than dry and honking
- Nasal discharge, especially thick or colored
- A cough lasting beyond about three weeks, or one that was improving and has worsened
- Any collapse, blue-tinged gums or obvious distress, which is immediate
The reason that list matters is pneumonia. A minority of dogs develop it, the groups above are the ones who do, and it is far better caught early than late.
The vaccine: what it does and what it does not
This is where most of the preventable disappointment comes from.
It reduces severity rather than guaranteeing prevention. A vaccinated dog who picks something up usually has a milder, shorter cough. That is a worthwhile outcome and it is not immunity.
It does not cover everything. The common vaccines target Bordetella and parainfluenza, often with adenovirus. Canine influenza is a separate vaccine. Mycoplasma and the respiratory coronavirus are not covered at all. So “fully vaccinated and still coughing” is an ordinary outcome, not a failure.
It needs lead time, and how much depends on the form. This is the practical point. The versions given into the nose or into the mouth work quickly: one application, with protection expected in about three to five days. A dog who has never had it before and is getting the injectable form instead needs two visits two to four weeks apart, and is not properly covered until about a week after the second one. If your dog boards on the twentieth of December, the conversation needs to happen in November, not on the eighteenth.
Facilities usually require it, and most want it given more than a few days before arrival. Check the specific requirement when you book rather than assuming.
Our urgent care is the route in for a dog who is coughing and also lethargic, off food or breathing hard. Our pet diagnostics team takes the chest images and samples that separate an upper-airway cough from pneumonia, and that distinction is the whole decision. Our medical services team handles the follow-up visit and checks that the cough is settling as it should.
Choosing where your dog stays
Facilities vary enormously and the questions that actually predict an outbreak are not the ones on the brochure.
- What do you require, and how far in advance? A facility with no vaccination requirement is telling you something.
- What happens if a dog starts coughing while my dog is there? You want a real answer involving separation, not a shrug.
- How is the air handled? Ventilation does more to prevent spread than disinfectant does, because the main route is airborne over short distances.
- How large are the play groups, and are they matched by size and style? Smaller, stable groups mean less contact and fewer scuffles.
- Are bowls and bedding shared or individual?
- Can I see the space? A facility that will not show you the kennels at a reasonable time is answering the question.
Book early, because the good places fill first for the holidays, and get any health check done well before departure rather than the day before, when there is no time to act on what it finds.
If your dog is already coughing
- Keep them away from other dogs. No park, no daycare, no grooming, and avoid the shared elevator at peak times. Assume contagious for at least a week or two after the cough settles, and potentially for considerably longer.
- Tell the facility and your dog walker if your dog has been anywhere in the last two weeks. Other owners deserve the chance to watch their own dogs.
- Switch to a harness. Pressure on the throat from a collar sets off the cough, and a dog who coughs because of their collar coughs more.
- Rest, properly. Short lead walks only, no running, no ball. Exercise reliably makes it worse.
- Humidify the air. Ten minutes in a steamy bathroom, or a humidifier in the room where they sleep, genuinely helps a dry cough.
- Keep eating and drinking normal, and tell us if either stops.
- Do not give anything from a cabinet. Human cough remedies are not appropriate for dogs and several contain ingredients that are harmful to them.
- Call us, and mention the cough when you book so we can plan where to see your dog rather than putting them in a waiting room with others.
We are open every day from 8 AM to 8 PM, which is a long day and covers most of this comfortably. The window to plan around is overnight, between 8 PM and 8 AM. A cough on its own can wait for morning. What should not wait is labored breathing, breathing with an open mouth at rest, blue or gray gums, a dog who has gone lethargic or stopped eating, or a dog who has collapsed: for those, go to an open emergency veterinary hospital and call ahead before you leave.
Our guide to coyotes near the Presidio covers a different risk of the same walks, and it is worth reading if the Presidio paths are part of your routine.
Questions we are asked
My dog is vaccinated. How did he get it?
Most likely because the vaccine does not cover every organism involved. The common vaccines target Bordetella and parainfluenza, canine influenza is separate, and mycoplasma and the respiratory coronavirus are not covered at all. On top of that, the vaccine is designed to reduce severity rather than to guarantee prevention. A vaccinated dog with a mild cough that clears in a week has arguably had the vaccine work exactly as intended.
How long before boarding should we vaccinate?
It depends on the form and on whether your dog has had it before, so the answer ranges from a few days to a few weeks. The versions given into the nose or into the mouth need one application and about three to five days. A dog who has never had it and is getting the injectable form needs two visits two to four weeks apart, plus about a week after the second one. Many facilities also specify a minimum interval before arrival. Ask us when you book the boarding, not when you pack.
Is it contagious to my cat? To me?
To other dogs, very much so. Cats can be affected by some of the same organisms, though they more commonly get their own respiratory viruses, so a coughing or sneezing cat in the same household is worth mentioning. For people, the risk is low and not zero: Bordetella bronchiseptica has occasionally caused illness in people with significantly weakened immune systems. Ordinary handwashing is a sensible precaution and there is no need for alarm.
He coughs like he is choking on something. Are you sure it is not stuck?
Not sure from a description, and that is exactly why it is worth a visit. The honking cough with a gag at the end is routinely mistaken for choking, and most of the time the cough is all it is. But something genuinely lodged, a collapsing windpipe in a small breed, heart changes and lung problems can all produce a cough, and they are handled completely differently. If your dog cannot breathe, cannot make a sound and cannot cough, that is a real emergency: call us and come straight in during our hours, or go to an open emergency veterinary hospital if we are closed.
My small dog has honked like a goose for years.
That is a different thing and worth having assessed properly. A chronic honking cough in a small breed, often worse with excitement, pulling on a collar or drinking, is more suggestive of a windpipe that collapses slightly than of an infection. It is not contagious, it does not come and go in the way kennel cough does, and the approach is quite different, starting with a harness instead of a collar and a weight check.
How long do we need to stay away from other dogs?
Plan on isolation through the cough and for a week or two after it settles at an absolute minimum. Be aware that the Bordetella organism can be shed for one to three months after infection, and canine influenza also sheds for longer than the cough lasts, so tell us before you book boarding or daycare again and we will advise on timing for your dog. The awkward truth is that your dog was contagious before you knew, so the isolation is partly about protecting the dogs you have not met yet. Tell your walker and anyone whose dog yours has played with recently.
Can I use a humidifier or should I avoid it?
Use it. Moist air soothes an irritated airway and makes a dry cough less exhausting, and ten minutes in a bathroom with a hot shower running achieves the same thing. Empty, rinse and dry a humidifier daily rather than topping it up, because a standing reservoir grows bacteria and mold that the unit then sprays into the room your dog is sleeping in.
Speak to the team at Urban Pet Hospital
If your dog is booked to board this season, call us now about timing rather than in December. If your dog is already coughing and is also lethargic, off food or breathing hard, call us and come in. Outside our hours, go to an open emergency veterinary hospital and call ahead before you leave.
Published by the team at Urban Pet Hospital.
This article is educational in nature and is not a replacement for hands-on assessment of your own pet by a veterinarian.
Urban Pet Hospital
2308 Lombard St, San Francisco, CA 94123
Phone: (415) 400-5754
Email: info@sfurbanpethospital.com
Hours: Every day 8 AM to 8 PM