This might sound crazy, but horses’ legs are very similar to human anatomy in many ways! They have many of the same bones and joints, but they are very different in size and strength.
The horse does have a knee cap, and this is part of the stifle joint. The correct name for this bone is the patella and it forms the femoropatellar joint.
So, now we understand how the stifle in the hind leg works, what about the joint in the foreleg that we call the knee on a horse? The carpus is another complex joint, ...
So, as we have learned, horses do have knee caps. However, these are part of the stifle joint in the hind leg, which is the equivalent joint to the human knee.