We study in human anatomy that when the knee is in full extension, the femur slightly medially rotates on the tibia to lock the knee joint in place. This reduces the work required to be done by the hefty thigh muscles. This happens in the knees in humans since they are the weight bearing joints.
So, is the mechanism of locking present in other animals? If yes, is it even in the fore limbs or just the hind limbs?