Cat

A pet Cat was the very first pet ever released. They were released long before the Summoning skill came out. In order to obtain a pet cat, a player must complete Gertrude's Cat and get a kitten from Gertrude. Their first kitten is free, and each kitten after that is 100 coins, but players cannot buy another kitten if they still have one. If players have an activated Ring of charos, obtained during the Garden of Tranquillity quest, they are able to charm Getrude into allowing them to choose their own colour. Otherwise, players will be given a random colour.

Like all pets, kittens need to be fed. If their hunger reaches 100%, they will run away in search of food. Any raw or cooked fish can be used to feed kittens. Additionally, players can feed their kittens a bucket of milk. Unlike other pets, kittens also need attention in the form of being interacted with, or else they will get lonely and run away. When a kitten is about to run away due to loneliness, players will receive a message in their chat box alerting them.

Players can interact with their kittens or cats in a number of ways, via right clicking their kitten and selecting "interact-with". Stroking a kitten requires no items, however if players wish to play with their kittens must use a ball of wool on their cat. Kittens can also catch rats but have a very low success rate. Players can also shoo away their kittens from this menu.

After a few hours, their kitten will grow into an adult cat, which no longer needs food or attention. Players are still able to interact with them, and their success rate at catching rats improves drastically. Players can also sell their cat to civilians in West Ardougne in exchange for 100 death runes, since the civilians need cats to keep the rats away from their grain. The sell amount increases to 200 death runes if they have completed the easy tasks in the ardougne diary. Players do not need to be wearing their ardougne cloak in order to get the bonus runes.

Even once an adult, cats will continue to grow, eventually becoming an overgrown cat. Once overgrown, a cat cannot catch rats anymore, but it can still be sold in West Ardougne. Players can also turn their overgrown cats into wily cats if they have completed Ratcatchers. Despite being limited to one kitten or cat at a time, there is no limit to the amount of overgrown cats that a player can own, although the number of wily or lazy cats owned is limited to one. However players can place adult cats (but not kittens) in their menageries if they wish to own more than one adult cat.

If a kitten or cat catches 100 rats, Gertrude will award the player with a cat training medal, which is one of the medium tasks in the varrock diary. In addition, cats in all stages of growth can be used in the Rat Pits minigame. They are also required for a number of quests, namely Icthlarin's Little Helper and its sequels, Smoking Kills, and A Tail of Two Cats.

A pet kitten or cat is also required for the Freeing Evil Dave sub-quest of Recipe for Disaster, one of the rewards being the ability to turn your kitten or cat into a hellcat. Another special cat variant, the purple cat is unlocked via the Purple Cat miniquest, which is available after completing Swept Away. A third special variant is a Clockwork cat which can be made on a Crafting table 4 in a player-owned house's workshop, or bought from other players.