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Devices that use some heating element (e.g., electric resistor, radiant energy, circulating fluid) to heat a pad or a blanket that is used to regulate an animal\'s core body temperature. Animal warming units typically contain a control unit (supplied with power using internal batteries or a connection to the power main) that houses controls and displays settings. This power unit connects to a heating pad or blanket (of varying sizes, according to the animal) on which the animal is laid or in which the animal is wrapped to heat the animal externally. Animal warming units also have flexible probe thermometers (usually rectal and sized to fit the animal) to continually measure the animal\'s core body temperature and register the temperature with the control unit. Some animal warming units contain alarms that sound an alert when the animal\'s core body temperature deviates from set controls. Animal warming units may be used on research animals where maintaining the animal\'s core body temperature at a constant temperature (homoeothermic control) is needed.
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