American Quarter Horse owners are being asked to check their horses if they showed at a cutting in March.
The Texas Department of State Health Services says about 150 people and horses might have been exposed to a rabid horse.
On March 19-21, cutters from Texas, Indiana, Iowa, Louisiana and Mississippi attended the American Southwest Texas Cutting Horse Association Show in Belton, Texas. On March 25-27, the rabid horse was at the Lufkin Cutting Horse Association show in Lufkin, Texas.
The affected horse was a 7-year-old bay gelding that died April 4 and tested positive for rabies April 6.
Health officials urge people who might have been exposed to call their doctors for more information and to contact their horses for more on rabies.