goodness no, i don't let mine in. i have 3 cats now. my earlier cat, we lost at 17 years, had evidently eaten a tiny, tiny bit of poly batting and started throwing up everything. he ended up getting a barium enema and x-ray and another enema to get rid of the barium.
so my 3 stay out. i have a bi-fold door and have to put a gallon of distilled water in front of it to keep them from opening it. but they behave and wait for me.