There are so many supports in the middle that you can’t see very well in the pictures. There’s no room to put a small litter box in the back like in the picture. Make sure you put a small cat tree in before completing it or you won’t be able to fit it through the narrow door. Our other cat kennel has double doors and it works much better. The panels easily collapsed with just the weight of a 9 pound cat. It was anchored right but a wire in the panel broke with the 9 pounds and collapsed with my kitty on. She’s so scared she won’t go near it now. It’s going back.