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Prevent the Spread of Dog Flu

A simple vaccination can keep your dog and community safe from an outbreak.


Pet Parent's Guide to Infectious Disease

Stories on pets and how to protect them from diseases


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A Highly Contagious Respiratory Disease

All it takes is one interaction for your pet to contract Dog Flu.

It Happens So Fast

Almost every dog exposed to the virus will become infected.2

Dog Flu can pass from dog to dog through direct physical contact or from virus particles in the air. It can also be spread through objects that were touched by infected dogs, like toys or water bowls.

Danger Zones

Some of your dog’s favorite places are high risk areas. Dog parks, day cares, boarding facilities and other pet-friendly locations can all pose a threat to your dog.

A Growing Concern For Dogs

States with Reported Cases of Dog Flu*

The first confirmed Dog Flu (H3N8 strain) outbreak occurred in Florida at a greyhound racing track. Since then, another strain has emerged (H3N2) and one or both strains have been seen in almost every state in the US.

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  • H3N8 strain only
  • H3N2 strain only
  • Both strains
  • Recent outbreaks

*Cornell University, Test Summary for Canine Influenza Virus in Dogs not Affiliated with Greyhound Racetracks, 2009; Crawford, et al., Transmission of Equine Influenza Virus to Dogs, P.C., 2005. Syndromic surveillance data of Cynda Crawford, DVM, PhD, University of Florida; Edward Dubovi, PhD, Cornell University; Sanjay Kapill, DVM, PhD, ACVIM, Oklahoma State University; IDEXX Laboratories and Cornell AHDC CIV Surveillance Network.

Last updated 08/2021

Have recent outbreaks of dog flu (canine influenza) raised your concern about your dog’s health?
Stay up to date on the latest dog flu outbreak information.

Dog Flu can be difficult to diagnose and often difficult to treat.

Be aware of the following common signs of Dog Flu:

Steve Dale on Dog Flu

Learn more about the risk and prevention of Dog Flu.

If This Dog Could Talk!

Tour to Prevent Dog Flu

For Professionals
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The Infectious Disease Handbook, Powered by Nobivac

Stay on top of preventive care, and keep your business free from an outbreak, with this free handbook from medical and industry professionals

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AAHA Lifestyle Based Vaccination Calculator

Update your vaccination protocol using the new AAHA Lifestyle Based Vaccination Calculator

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Kennel & Boarding Safety Recommendations

AAHA reports on how kennels and boarding facilities are reacting to the Dog Flu outbreak


Learn from what other pet owners and professionals have experienced.

2. Crawford C, Spindel M. Canine influenza. In: Miller L, Hurley K, eds. Infectious Disease Management in Animal Shelters. Ames, IA: Wiley-Blackwell; 2009:173-180.

Are you a Professional?

We have tools and tips to help contain the spread of Dog Flu in your facilities.

About Dog Flu

Read more about Dog Flu origins, treatment, symptoms and prevention.