The 2025 horse virus outbreak has grown much faster than anyone expected. It began with a group of sick horses after the WPRA World Finals & Elite Barrel Race in Waco, Texas. What looked like a small cluster has now become a multi-state equine health crisis. Cases of EHV-1 and the neurologic form, EHM, have been confirmed across the country.
Horses that competed in Waco—or even passed through the venue—traveled home soon after. Many carried the virus with them. This has led to new cases in Texas, Oklahoma, Louisiana, Colorado, New Mexico, Arizona, Washington, and South Dakota.
For trainers, owners, breeders, and event organizers, the speed of the outbreak has been alarming. Within days of the event, horses developed fevers, showed neurologic signs, and tested positive for EHV-1. The virus has already caused major event cancellations, including a key San Antonio Stock Show & Rodeo qualifier. Several arenas and rodeo facilities in Texas have also shut down temporarily to stop further spread.
This outbreak is serious. EHV-1 spreads fast, survives on surfaces, and can move quietly between barns through travel, shared gear, and even human contact. The neurologic form, EHM, can appear suddenly, which makes the situation especially worrying for owners.
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