My regular door has a doggy door. My patio screen door I just leave open so that Padfoot can run in and out.
Except, remember that bird's nest that was in the cabinet on my patio?
Now there's one in my laundry room (off the patio).
I want to pretend that this is because I have such a warm and nurturing environment for birds.
But if that were true, they wouldn't have to build their nests next to a bottle of bleach.