The stifle joints must point in the line of travel, not outward resulting in a bowlegged appearance nor hitching in under the dog.
膝关节必须指向运动的方向,不能向外,形成弯腿或被绊住。
英语百科
Stifle joint
The stifle joint (often simply stifle) is a complex joint in the hind limbs of quadruped mammals such as the sheep, horse or dog. It is the equivalent of the human knee and is often the largest synovial joint in the animal's body. The stifle joint joins three bones: the femur, patella, and tibia. The joint consists of three smaller ones: the femoropatellar joint, medial femorotibial joint, and lateral femorotibial joint.