A kitty. (duh)
um.......a, uh.....
the original and yet unoriginal, wereWOLF!
is that american Red, Grey, or Dire?
I think I'd go for werepanther myself. BIG kitty. purrrr....
if we're going for mythical creatures, i'll go for were-grim (the dog, not the skeleton)
if not, were-wolverine or were-panther will suffice...
a were-butterfly... you;d live for a day