Why is your pig walking on his knees?

A pig walking on its knees could be a sign of a few different issues. It might be experiencing discomfort or pain in its legs or joints, possibly due to an injury or a medical condition. Alternatively, it could be a learned behavior from being housed in an environment where kneeling was necessary for food or social interactions. Observing the pig closely and consulting a veterinarian would be important to determine the underlying cause.