Health regulations mandate vaccinations and blood testing of animals crossing state lines, so rodeo stock receives routine care. An injured animal will not buck well and hence a cowboy cannot obtain a high score for his ride, so sick or injured animals are not run through the chutes, but instead are given appropriate veterinary care so they can be returned to their usual level of strength and power. PRCA regulations require veterinarians to be available at all rodeos to treat both bucking stock and other animals as needed.