It is extremely important to protect calves from the cold as it can lead to severely frostbitten body parts as well as hypothermia and even death. “Frostbite is the damage to body tissues that occurs when these tissues freeze,” Dr. W. Dee Whittier wrote in a paper called Calves and the Cold. “The extremities are most at risk. Frozen ears and tails result in changes of cattle appearance but do not affect cattle performance significantly.” If a calf freezes its feet, however, it must be put to sleep or it will die.