quadruped - an animal especially a mammal having four limbs specialized for walking

hock - tarsal joint of the hind leg of hoofed mammals; corresponds to the human ankle

gaskin - lower part of a horse's thigh between the hock and the stifle

stifle, knee - joint between the femur and tibia in a quadruped; corresponds to the human knee

hind limb - a posterior leg or homologous structure in other animals