I don't quite understand the cats' mechanisms. Sometimes the yellow cat would open the door, and I couldn't stop it. I didn't know how to deal with the gray cat, so I didn't even get through the first night.
Psst.. There's good information in the extras menu... Also...door automatically opens when the camera is pulled up.
The game doesn't explain very clearly how to defend against that gray cat.
Apologies. The cat infos are still in early development and I'm trying to update them to be better