I was pretty sure he was - just wanted to make sure. He's probably quite young, Horsfield tortoises are notorious for growing very smoothly, so it would appear he has been overfed at some point in time and probably been on the wrong diet (possible lack of supplementation). He really needs to be on a strict diet, as irregular shell growth will also be reflected in his bone growth, so it is imperative his growth is slowed down so all nutrients can be concentrated on strengthening the shell and bones.
Have you seen the Tortoise Table website at all - it really is excellent and should help in providing a wide range of foods, which would be greatly beneficial with supplemantation:-
