RuneScape Wiki

The cat blanket is a piece of furniture that can be built in the kitchen of a player-owned house with the Construction skill.

Cats belonging to anyone can rest on the blanket. Kittens can rest here too. When exiting house via portal, the kitten/cat sleeping on basket will come to the player. To get your kitten/cat to sit on the cat blanket you must pick it up and then click on the animal in your backpack to highlight it, then click on the cat basket and it will sit down in it.

Cats must be picked up during building mode.