Includes wheel & a section on top to insert a water bottle that is also included. Easily disconnects from the top with the green handles. Can disconnect from bottom, too.

Somehow during storage a crack happened on the blue ceiling of the house. While it brings down its value, it doesn’t affect the safety or containment of the pet at all.

Kaytee Critter Trail Brand from PetSmart. Paid $30. The covered openings on the side leave room for expanding the house for your pet. Google for ideas.