A heating pad for use with animals, or pet heating pad. The pet heating pad provides a pad with a cushioned exterior and a flexible but resilient interior that prevents overheating by maintaining or returning the pet heating pad to a flat profile. The pet heating pad heating system includes a heating element with temperature limitation controls for safe operation surrounded by layers of material selected for temperature control properties. The result is a pet heating pad that substantially reduces or eliminates the problems normally associated with heating pads such as hotspots, overheating, bunching, and folding while providing a pet with a physically and thermally comfortable surface upon which to rest.