Equine influenza has been confirmed in Wellington County, Ontario. A 7 year old Quarter Horse gelding used for barrel racing was at an event in Huron County and developed a fever after returning home on May 11, 2025. Sampling confirmed an infection with influenza virus. The horse is recovering. The horse was not vaccinated. There are 2 additional suspected cases. The farm owner, working with their veterinarian, has instituted voluntary animal movement restrictions and biosecurity protocols.