There's a neighbourhood can moaning & howling outside the laundry door. That's the door with the magnetically activated pet door. If a critter with a magnet slung around its neck tries to get in it can, otherwise only brute force, such as applied by a possum (it happened once, years ago) will allow entry. My cat was, of course, quite interested so before she could get out & possibly injured in a cat fight (she's not yet recovered from the last one) I refitted a barrier over the pet door.