When raising a kitten, it needs to be fed and interacted with. Kittens will eat any raw fish, cooked fish, or a Bucket of milk; if you have a Hell kitten remember to not give it milk unless you wish to remove the hellish effects! Interacting with the kitten consists of stroking the kitten, playing with toys (Ball of wool or Toy mouse), or catching rats. If your kitten catches 100 mice, you will be awarded a cat training medal.
It is possible to turn a Cat (purple) into a Hellcat(and vice versa), however, it will only result in a normal Hellcat; when you cure the cat off its hellish ways, you will be left with a purple cat once more.
The various growth stages for Hell cats are: Catspeak amulet.
Follower: A hellish pet cat!