Update: he now has a dedicated door that he can go through in order to go through the rooms. My mom is allergic to him, so he’s not allowed to roam her house (dw, he has like 4 rooms all to himself now)
Nope, it’s just a door I got on Amazon. My brother cut the wall open and screwed it in place. It came with flaps that we didn’t install because they were annoying, and they just seemed unnecessary