Is bronchitis in dogs contagious?

Bronchitis itself isn't, but the infections that often lead to it, like kennel cough, are. If your dog's cough started after a stay at a kennel, daycare, or the groomer, treat it as contagious until it clears and keep them home from the dog park.

How do I tell bronchitis from kennel cough?

They can sound alike: a harsh, dry cough, sometimes with gagging. Kennel cough usually arrives suddenly in an otherwise healthy dog and runs its course in a week or two. Bronchitis tends to show up in a middle-aged or older dog, comes with more phlegm and wheezing, and hangs on for weeks. If you're not sure, book a free consultation and describe what you hear. We'll tell you honestly what it sounds like, including whether a vet visit makes sense.

When is a cough an emergency?

If your dog is struggling to breathe, breathing with an open mouth at rest, has blue or grey gums, or collapses, that's a vet visit right now, not a consultation with us. Labored breathing is the one symptom we never ask a family to wait on.

What does Nzymes recommend?

The Breathe Easy Bundle: Ox-E Drops for the vaporizer and the bowl, and Antioxidant Treats for the immune system underneath. The program page explains how the vaporizer step works and what to expect. If something comes up the page doesn't cover, or you'd rather talk it through with a person first, our free consultation is always there.

Bronchitis in Dogs: What to Know

Bronchitis in Dogs:
What to Know

First published April 2016 · Revised 2026From the Respiratory & Kennel Cough shelf

You know the sound. A harsh, dry cough that comes in fits and won't quite let go. Bronchitis tends to find middle-aged and older dogs, and it rarely comes out of nowhere. Left alone it can turn into pneumonia, COPD, or emphysema, and those last two can't be undone. So let's talk about what it is, what feeds it, and what you can do at home starting today.

Where bronchitis comes from

Bronchitis in dogs, acute or chronic, shows up most often in middle-aged and older dogs. Nobody can say for certain what sets it off, but it often follows a respiratory problem that never fully cleared, like a bout of kennel cough from months back. What your dog breathes day in and day out matters too: cigarette smoke, fumes, even ordinary house dust.

If the coughing fits have gone on for several days, don't wait it out. Untreated, bronchitis can turn into pneumonia, COPD, or emphysema. Those last two can't be reversed, so this is one worth taking seriously while it's still just a cough.

Common signs

Here's what families usually describe to us:

1Harsh, dry coughingComes in spasms, often worse after excitement or early in the day.

2More phlegmA wetter sound than kennel cough, sometimes brought up at the end of a fit.

3Shortness of breathTiring sooner on walks, or breathing faster than usual when resting.

4WheezingA whistle or rasp on the breath, easiest to hear when the house is quiet.

5Gagging episodesA cough that ends in a retch or gag, as if something is stuck in the throat.

Reasonable steps to take now

Clear the air first. If you suspect bronchitis, start with what's in the air. Wherever you can, switch to natural cleaners for floors and carpets, and do the same with laundry detergent and fabric softener. Remember your dog's nose lives a lot closer to the floor than yours does; just walking across a carpet stirs up a cloud of dust at their height. When you vacuum, keep your dog out of the room until the dust has settled.

Watch the breathing, not just the cough. A cough is miserable to listen to. Trouble breathing is something else entirely. If your dog is working to get air, or the distress is clearly getting worse, that's a vet visit, today. For everything short of that, book a free consultation first. Tell us what the cough sounds like, how long it's been going, and what your dog is taking, and we'll tell you honestly what we're hearing, including whether a vet visit makes sense.

The Breathe Easy BundleOx-E Drops for the vaporizer and the bowl, Antioxidant Treats for the immune system underneath, and the interactive step-by-step guideSee the program →

Support the airways directly. Often a bacterial or viral infection is riding along with the bronchitis, which is a big part of why it hangs on. This is where the vaporizer step in the Breathe Easy program earns its keep: Ox-E Drops in a vaporizer or a pan of steaming water carries support straight to the bronchial passages where the trouble actually is, while the same drops in the water bowl work from the inside. The program page shows how it's done →

Not sure what you're hearing? Tell us about the cough, how long it's been going, and how your dog is otherwise. We'll listen. Book a free consultation →

A cough that won't quit has a way forward.

A cough that won't quit is one of the things families bring to us most often. Whether you're still deciding, or you've started and something has you second-guessing, book a free consultation and tell us what the cough sounds like, how long it's been going, and what your dog is taking, and we'll tell you honestly what we're hearing, including whether a vet visit makes sense.

Where bronchitis comes from

Common signs

Reasonable steps to take now

A cough that won't quit has a way forward.