An outbreak of Equine Herpesvirus has been confirmed in New Mexico, where affected horses showed fever and neurologic symptoms. Additional minor cases have been reported in Arizona, all of which are currently under quarantine. The horses attended the 2025 WPRA World Finals and Elite Barrel Race event in Waco, TX, on November 5-9, 2025. The horses in Oklahoma participated in the Barrel Futurities of America event in Guthrie, OK, on November 17-18, 2025, before the remainder of the event was canceled.