You are home sick with the flu, and your dog is curled up beside you being the best nurse imaginable, and a question crosses your mind: can my dog catch this from me?
The short answer is no. Your dog is very unlikely to catch human influenza from you under normal circumstances. But that does not mean dogs are immune to flu-like illness. Dogs have their own form of influenza, called canine influenza or dog flu, and it is a genuinely contagious respiratory infection that dog owners should know about. There is also kennel cough, a related respiratory illness frequently confused with dog flu that spreads in many of the same situations.
This guide covers what dog flu actually looks like, how it differs from kennel cough, when to call your vet, and how to protect your dog before they are exposed.
Can Dogs Catch the Flu From Humans?
Let’s answer this directly before anything else. According to the CDC’s guidance on canine influenza, there are no reported cases of dog influenza viruses being transmitted to humans, and current evidence suggests dogs are very unlikely to contract seasonal human influenza from people under normal circumstances.
The viruses that cause flu in people and the viruses that cause dog flu are different strains adapted to their respective hosts. When you are home sick with influenza, your dog is not at meaningful risk of catching it from you.
That said, humans can play an indirect role in spreading dog flu between dogs. The virus can be spread between dogs by people on infected skin or clothing. If you have been around a dog with influenza, washing your hands and changing clothes before interacting with your own dog is a sensible precaution.
Here Is What It Looks Like When Dogs Get The Flu
Think of dog flu as the canine version of what you go through. There’s a persistent cough, fever, runny nose, fatigue, and reduced appetite. Most dogs recover fully, but some develop serious complications. Knowing what to watch for makes a meaningful difference in how quickly your dog gets the care they need.
Canine influenza virus is a highly contagious respiratory infection. According to the American Veterinary Medical Association’s canine influenza guide, nearly all dogs exposed to canine influenza become infected, and infection can occur at any time of year.
There are two strains currently circulating in the United States:
- H3N8 — First identified in racing greyhounds in Florida in 2004, this strain originated in horses before adapting to dogs.
- H3N2 — First introduced to the United States from Asia and responsible for multiple significant outbreaks since 2015.
One detail worth knowing: infected dogs can be contagious even if they seem healthy and can spread the virus for up to four weeks after first being exposed. An apparently healthy dog at a dog park or boarding facility may already be contagious before anyone knows they are sick.
How Does Dog Flu Spread?
Canine influenza spreads quickly and efficiently, particularly wherever dogs spend time together indoors.
The virus spreads efficiently through respiratory droplets produced when infected dogs cough or sneeze. A single infected dog in a kennel, daycare, or grooming salon can expose every dog in the building before a single symptom is visible.
The virus can survive on skin and hands for 12 hours, on clothing for 24 hours, and on surfaces for up to 48 hours. A water bowl, a leash, a doorknob, or any surface an infected dog has touched becomes a potential transmission point for nearly two days.
It takes two to four days after exposure before clinical signs develop. During this window your dog can already be spreading the virus, which is one of the main reasons outbreaks move so quickly through boarding facilities and dog parks before anyone realizes what is happening.
Dog Flu Symptoms: What to Watch For
If your dog has been in a high-contact environment recently and starts showing any of the following, dog flu is worth considering.
The most common clinical sign of canine influenza is a cough that does not respond to antibiotic or cough suppressant therapy and lasts 10 to 21 days. If your dog has been coughing for more than a day or two and it is not improving, that persistence is the signal to call your vet.
Other symptoms to watch for:
- Nasal and eye discharge
- Fever, sometimes reaching 104°F to 106°F in more severe cases
- Lethargy and reduced energy
- Reduced appetite
- Sneezing
Most dogs experience the mild form. A smaller percentage develop serious complications. Around 10 to 20% of dogs with canine influenza develop more serious illness, typically pneumonia. The AVMA reports that mortality is generally low but may reach 1 to 5% in some outbreaks, particularly in vulnerable dogs. Puppies, senior dogs, and immunocompromised dogs carry the greatest risk of serious outcomes.
Most dogs recover from the flu within two to three weeks with appropriate supportive care.
Kennel Cough vs. Dog Flu: How to Tell the Difference
If your dog is coughing, you are probably trying to figure out which of these two conditions you are dealing with. Here is the clearest way to think about it.
Kennel cough (formally known as canine infectious respiratory disease complex) is a broad term for a contagious upper respiratory infection. As the AVMA explains, it is often caused by Bordetella bronchiseptica but can also involve viruses like parainfluenza or canine adenovirus, and it spreads quickly in places where dogs congregate. The hallmark is a harsh, honking cough that sounds as though something is stuck in the dog’s throat.
| Canine Influenza | Kennel Cough | |
| Cause | Influenza A virus (H3N2 or H3N8) | Bordetella bacteria, parainfluenza virus, or both |
| Cough type | Moist or dry, persistent | Dry, honking, often sounds like gagging |
| Fever | Common, can be high | Mild or absent |
| Incubation | 2 to 4 days | 3 to 10 days |
| Duration | 10 to 21 days | 1 to 2 weeks in most cases |
| Contagious period | Up to 4 weeks | Several weeks |
| Vaccine available | Yes | Yes (Bordetella vaccine) |
Because canine influenza virus is virtually identical in presentation to other respiratory infections such as kennel cough, many cases may be mistaken for kennel cough or other infections. Any dog with these clinical signs should be seen by a veterinarian.
Do not try to diagnose the cause at home. Treatment differs depending on whether the infection is viral, bacterial, or both, and a vet exam is the only reliable way to know which you are dealing with.
When to Call Your Vet About Dog Flu Symptoms
Contact your veterinarian the same day if your dog has been coughing for more than a day or two, particularly if any of the following are also present:
- Fever alongside the cough
- Significant lethargy or unusual stillness
- Reduced appetite or stopped eating entirely
- Nasal or eye discharge that is thick, yellow, or green (these signal a secondary bacterial infection)
- Labored, rapid, or shallow breathing
Breathing difficulties are the most urgent sign on that list. They can indicate pneumonia, which is the most serious complication of canine influenza. If your dog is struggling to breathe, seek emergency veterinary care immediately rather than waiting for a scheduled appointment.
Certain dogs are more vulnerable to serious complications and should be seen promptly even with mild symptoms:
- Puppies — their immune systems are still developing and cannot mount the same defense as an adult dog
- Senior dogs — less able to fight off infection and more likely to develop secondary complications
- Dogs with underlying health conditions — heart disease, respiratory conditions, or compromised immune function all increase risk
- Brachycephalic breeds — bulldogs, pugs, and French bulldogs have compressed airways that put them at greater baseline respiratory risk even before illness
For Colorado Springs dog owners, Ponderosa Veterinary Clinic is here to help. Call us at (719) 433-7671 if you are unsure whether your dog’s symptoms warrant a visit, we would rather you call than wait.
Treatment for Canine Influenza and Kennel Cough
There is no cure for canine influenza. Treatment is supportive. That means keeping your dog comfortable, hydrated, and rested while their immune system does the work, and preventing secondary complications from developing.
Your vet may recommend:
- Rest and full isolation from other dogs for the duration of illness
- Ensuring your dog stays well hydrated
- Anti-nausea medication if appetite is significantly affected
- Antibiotics if a secondary bacterial infection is confirmed or strongly suspected
- Cough suppressants at your vet’s discretion
- IV fluids or hospitalization in more severe cases
Kennel cough treatment follows a similar approach. Mild cases in healthy adult dogs sometimes resolve with rest alone. More significant cases, particularly in puppies, senior dogs, or immunocompromised dogs, may require antibiotics or other medications.
One important note: do not give your dog any human flu medications. Many common over-the-counter drugs are toxic to dogs, and no human flu treatment is safe or appropriate for canine influenza.
If your dog is showing respiratory symptoms and you are not sure what to do next, that is exactly what we are here for. Ponderosa Veterinary Clinic offers sick visits and wellness exams so you do not have to guess.
How to Protect Your Dog From Canine Influenza
Prevention is significantly more straightforward than treatment. Here are the most effective steps you can take.
Vaccination Is the Most Reliable Protection
Both canine influenza and kennel cough have available vaccines, and vaccination is the most reliable preventive measure for dogs with regular exposure to other dogs.
Studies suggest vaccination can significantly reduce the severity of illness and may reduce viral shedding, which also helps protect other dogs in shared environments. Some controlled studies have shown strong protection against symptomatic disease, though as with any vaccine, individual results can vary.
The dog flu vaccine is a series of two shots given three to four weeks apart. Your dog is not fully protected until seven to ten days after the second shot, which means vaccination should be planned at least a month before a boarding stay, dog show, or other high-exposure event.
The Bordetella vaccine protects against the most common bacterial cause of kennel cough and is recommended for most dogs who regularly interact with other dogs. Many boarding facilities and grooming salons require it before accepting your dog. Ponderosa Veterinary Clinic offers dog vaccinations and can advise on which vaccines make sense for your dog’s specific lifestyle and risk level.
Know the Higher-Risk Environments
Dog parks, boarding kennels, doggy daycares, grooming salons, training classes, and dog shows all carry elevated transmission risk for both canine influenza and kennel cough. The AVMA’s guidance on disease risks in social settings recommends asking any facility about their infection control practices and their plan for isolating dogs that develop respiratory symptoms before your dog enters. Staying current on vaccinations before your dog enters these environments is key.
If there is a known canine influenza outbreak in your area, consider temporarily reducing your dog’s exposure to group indoor settings until the outbreak subsides.
Practice Good Hygiene
Clean and disinfect food bowls, water bowls, and shared toys regularly, particularly after your dog has been around other dogs. Canine influenza can survive on surfaces for up to 48 hours, so surfaces matter more than most people realize.
Human transmission between dogs is also worth taking seriously. If you have handled a sick or unknown dog, wash your hands and change clothes before interacting with your own pet. The virus can travel on human hands and clothing even when the carrier shows no symptoms.
Isolate a Sick Dog Promptly
If your dog develops symptoms, keep them away from other dogs immediately. Your veterinarian may recommend isolation for three to four weeks depending on the strain involved and your dog’s specific situation, including keeping them separated from cats in the household, as canine influenza has occasionally been diagnosed in cats as well. Follow your vet’s specific guidance rather than applying a fixed timeline.
Frequently Asked Questions: Can Dogs Get the Flu?
Can my dog catch the flu from me when I am sick?
Under normal circumstances, no. Current evidence suggests dogs are very unlikely to contract seasonal human influenza from people in typical household situations. When you are sick and your dog is curled up beside you, you do not need to worry. Your dog is safe to be near you, and being there for you is exactly what they want to do.
Can I catch dog flu from my dog?
There are no instances of dog influenza viruses being transmitted to humans. You cannot catch dog flu from your dog. You can, however, carry the virus on your hands or clothing and spread it between dogs, so washing your hands after handling sick or unknown dogs is a good habit regardless.
What is the difference between dog flu and kennel cough?
Both are contagious respiratory illnesses with overlapping symptoms, but they have different causes. Canine influenza is caused by influenza A viruses, while kennel cough is typically caused by Bordetella bacteria, parainfluenza virus, or a combination. Canine influenza tends to produce higher fevers and more pronounced lethargy. A vet exam is the most reliable way to distinguish between them.
Can my cat catch dog flu?
Possibly, though it is not common. Canine influenza has occasionally been diagnosed in cats, particularly in shelter settings. Cats infected with canine influenza may show a runny nose, sneezing, congestion, low energy, lip smacking, and drooling. If your dog is diagnosed with canine influenza, isolating them from your cats during the illness period is a sensible precaution.
Does my dog need the canine influenza vaccine?
It depends on your dog’s lifestyle and risk level. Dogs who regularly board, attend doggy daycare, visit dog parks, or participate in dog shows have meaningfully higher exposure risk and are strong candidates for the vaccine. Dogs with minimal contact with other dogs may not need it. Talk to the team at Ponderosa Veterinary Clinic during your dog’s next wellness exam to determine what makes sense for your specific dog.
How long does dog flu last?
Most dogs recover from canine influenza within two to three weeks with supportive care. Dogs with mild kennel cough typically recover in one to two weeks. Dogs with secondary bacterial infections, underlying health conditions, or more severe presentations may take longer and require more intensive veterinary support.
Keep Your Dog Protected Before They Need It
Dogs spend time in exactly the kinds of places where canine influenza spreads most easily. For example, dog parks, boarding facilities, daycares, and grooming salons. Staying current on vaccinations, knowing what symptoms to watch for, and calling your vet early when something seems off are the most effective tools you have.
At Ponderosa Veterinary Clinic, our Colorado Springs team offers dog vaccinations,wellness exams, and compassionate care for dogs showing signs of respiratory illness. Whether you want to discuss vaccination options or you are concerned about symptoms your dog is showing right now, we are here to help.
Contact us today to schedule an appointment.
This article is intended for educational purposes and should not replace the advice of a licensed veterinarian. If you have concerns about your dog’s health, please contact your veterinary clinic directly.
