The beds just screw onto the posts beneath them and while putting it together, one of the posts wouldn't screw on so I had to remove the entire post to look at it. When I tried to unscrew the bed, the screw in the post came out but stayed attached to the bed part and would not come off. Thankfully this happened before my cats were on it! I couldn't get a hold of the company to replace but it's better with it off because there is no room for the cats to step down from on top of the house. Without the post it gives them a little space for them to step down before they jump down. I'd pick something that has adequate spaces for them to maneuver around. Also, the beds are pretty small.