The Equine Disease Communication Center reported that a farm in Thurston County, Washington, is under a voluntary quarantine after three horses tested positive for equine influenza. The animals from the farm had traveled to a barrel race and came home to expose four other horses on the farm. 

The Washington state veterinarian is currently working with the private vet. 

For more information about Equine Influenza go to this AAEP Fact Sheet.