Here's more than you need, even enough that you can use it yourself.
Feral:
[spoiler]Type: (Humanoid, M. Humanoid) -> M. Humanoid
HD: racial HD -> d10 (none in this case)
Speed: Land +10ft
AC: +6 or base creature; whichever is higher
Attacks: gain two claw attacks (1d8 medium) if you don't have them
Special: (1+ HD) Improved Grab (4+ HD) Pounce (8+ HD) Rake (12+ HD) Rend. If base creature has same ability, use better version.
Special Qualities: (1-7 HD) Darkvision 60 ft (8-11) Darkvision 90 ft (12+) 120 ft Darkvision; (1-3 HD) Fast Healing 2 (4-7 HD) Fast Healing 3 (8-11 HD) Fast Healing 4 (12+) Fast Healing 5
Abilities: +4 Str -2 Dex +2 Con -4 Int(Min 2) +2 Wis
CR: (1-3 HD) CR+1 (4-7 HD) CR+2 (8-11 HD) CR+3 (12+) CR+4 (a flat +2 is probably more appropriate)
Treasure: 1/2 coins, standard goods/items
Level adjustment: +1 (yeah, it's undercosted)
[/spoiler]