"Let them in"? - there's a choice? Well, no one let me know.My two cats (both rescue cats - one a black & white tuxedo female, and my "velcro kitty"- a completely black Bombay) fully believe that I can do nothing without their assistance. Although I have a son-in-law with cat allergies, there would be no way to keep the cats out of the sewing without getting rid of them. And, since they are my only company from dawn until dusk, when my husband comes home, that is not really a choice. I just make sure to launder the quilts on their way out of the house. : )