This idea was inspired by Faith the two legged dog. She was born with a brain defect that affected her bodies development causing her to walk on her back legs.

With this mutation the lion could be positioned in different ways, which is ever best for the artist. I had first thought they could be sitting down, lying on its back, or standing on its hind legs. (The hind legs might not work though).

This mutation would be a lethal mutation, since it will have a harder time to get around and a smaller chance against large predators