Talk to Unferth in Burthrope and you will find out his cat named Bob has gone missing. Agree to help him find him and Unferth will ask you to talk to his friend Hild who lives nearby him who can also help look for Bob. Make sure you have your cat/kitten and amulet of catspeak on at all times.
Pet Cats
There’s not much more rewarding in life than raising a pet and seeing it develop into adulthood. In RuneScape, of course, this can mean raising a kitten from being a cute ball of fur to the dizzy heights of wily cats and their supreme vermin-catching skills. Yes, cats in RuneScape are a bit more exciting than your next door neighbour’s kitty.

Where to get your cat
Gertrude, who lives just west of Varrock, is a bit of a cat fanatic. Her own cat, Fluffs, also provides her with regular litters of kittens. In order to own a kitten, or any other type of cat, you must have completed the Gertrude’s Cat quest. When you complete this, Gertrude will give you your first kitten.
If you lose your kitten, or you want a new kitten later on, come back to Gertrude and she will sell you one for 100 coins.
 
Looking after your cat
There are five main types of cat: kitten, grown cat, overgrown cat, wily cat and lazy cat. If you want your kitten to develop further you must take care of it. If you fail to feed your kitten, or pay too little attention to it, it will run away and never come back. It’s a lucky thing, then, that looking after your cat is so easy.
Kittens can be fed any fish, cooked or uncooked (except for seasoned sardines - they don’t share their mother’s taste for spicy food. Also note that seaweed, edible or otherwise, is not a fish), as well as milk. They will also eat any rats they catch, but kittens are too young to be very good at this, so it pays to keep some fish or milk handy
Kittens also require a bit of attention, which is really very simple. Right-clicking the kitten and selecting ‘Interact with Kitten’ will allow you to then select ‘Stroke’, which keeps any kitten happy. You can also get a ball of wool to entertain your cat; simply use the ball of wool on your cat and it will merrily play with it. They will also play with plain wool, but will destroy it as it plays.
All cats enjoy hunting rats, and you can do this anywhere you see ordinary level 1 rats running about. Simply right-click on your cat and select ‘Interact with’, before choosing ‘Chase’. Kittens are not very good at hunting rats, but they improve as grown cats, and improve again as wily cats.
If you would prefer to keep your cat away from flea-infested rats, you might like to go to your house and make some clockwork mice in your workshop. Like ordinary rats, your cat will hunt clockwork mice. Be aware that your cat will also destroy them, so you might like to make a few if you plan on training your cat in this way.
No cat ages in your inventory or in the bank, so in order for them to develop you need to take them out into the world. Once your kitten has been active for a sufficient period of time (so, not in your inventory or bank) it will transform into a fully grown cat. Grown cats are better at catching rats and require no more feeding or attention.
After a further period, your cat will transform into an overgrown cat. Overgrown cats cannot hunt rats except in the rat pits, and they will only transform into a wily cat if you take them to be trained by Felkrash, in the Port Sarim rat pit.

You may only upgrade an overgrown cat to a wily cat if you have completed the Rat Catchers quest.
Wily cats are the finest of all hunting cats, and can also run quite quickly. When your cat becomes a mighty wily cat, they also learn how to hunt creatures other than rats: wily cats can hunt kalphite larvae (in the Kalphite Lair) and butterflies. If your wily cat does not get enough exercise, though, it will become a lazy cat.
Lazy cats are not as athletic as wily cats, and can only hunt rats, but they can be retrained to become wily cats again. Should your wily cat become lazy, merely spend some time taking him hunting to work off his excess fat and your cat should transform back into a wily cat. The more time you spend at once exercising your lazy cat, the sooner it will be back to its energetic, wily state.
If you ever tire of your kitten or cat you can rid yourself of them by right-clicking on them, selecting ‘Interact with’ and then choosing ‘Shoo-away’. If you do this the cat will never return, so be very sure that you want to rid yourself of it.
You can own many cats at once, but there are a couple of limitations. You may own as many overgrown cats as you can handle, but only one kitten or grown cat, and only one wily or lazy cat.

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