Currently using to house 3 kittens. Someome said instructions are useless, I will go a step further and say they r garbage. Best put togehter with 2 people, wheels were the most difficult, I understand why some would leave off. You definitely need the cable ties to reinforce as hooks don't always align. Brought an extra pillow but will by a third as kittens love to sleep on it. Overall would recommend and a good value for $$.