When being raised, it needs to be fed and interacted with. Kittens will eat any raw fish, cooked fish, or a Bucket of milk. 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. Adult cats can also be fed and interacted with.
A kitten will take approximately 2.5 hours to grow into a Pet cat, at which time you can trade it for 100 Death runes to Civilians in West Ardougne. If you have completed the Easy Ardougne tasks, the price increases to 200.
It is possible to turn a purple wily cat into a Wily hellcat (and vice versa), however, it will only result in a normal Wily hellcat (or purple wily cat); when you cure the cat of its hellish ways, you will be left with a purple wily cat once more.
The various growth stages for purple cats are: Catspeak amulet.
Follower: A fully grown feline.