Stitch

Stitch is a quiet and mysterious, roaming around the wastelands in search of.. something.  He was a puppymill as a pup but soon escaped, and met a wolf met Lucas. They met and were soon happy together until something happened when the nuclear war started, a mutation. It made Lucas run away from him and Stitch never saw him again. Stitch found things to cover up his mutations. His paw is removable.