Equine influenza has been confirmed in the Regional Municipality of Niagara, Ontario. Two horses from the farm, including a 10 year old Quarter Horse mare used for barrel racing, competed at an event in the Hamilton Region from May 2-4, 2025 and developed respiratory signs after returning home. They both tested positive for equine influenza virus. The horses are recovering. The horses are not vaccinated. The farm owner, working with their veterinarian, has instituted voluntary animal movement restrictions and biosecurity protocols.
Related alert: Equine Influenza in Ontario, May 14, 2025