From About.com:
Underlying the stifle area is the stifle joint formed between the large hip bone (femur) which is equivalent to our thigh bone and the tibia, equivalent to our shin bone. The stifle...
The location is a bit hard to describe. To see a diagram of where the stifle is located, follow this link. http://img.quamut.com/chart/7321/34_horse_anatomy.jpg
(look at the tail end of the URL, it...