A Pet Cage is an item in Cube World.
The Pet Cage can tame one animal at a time. Upon a successful taming of an animal, and it'll appear equipped in the "pet" slot of the inventory.
Pet cages are used to keep pets in. To take a pet off the cage, you just need to equip it, and to put it back in just unequip the cage.
If the player has any pet food equipped , and changes to a pet cage by left-clicking it, the player will be holding the pet cage. This doesn't happen when switching between different pet cages.