Bull Holders Are Designed To Keep Bulls Calm While They Are Being Worked On. Bulls Tend To Get Stressed Out When They Are Restrained, Especially If They Have Not Been Handled Before. A Bull Holder Helps To Prevent Any Unnecessary Stress And Keeps Them Calm While They Are Being Treated. A Chain Veterinarian Is A Tool Used To Restrain Animals. These Tools Are Commonly Used For Cattle, Horses, And Dogs. They Are Often Used To Help Control Aggressive Animals.