My bathroom also has a cat litter box behind the door so I also have kitty visitors. As far as taking a shower with the door shut......forget it! I can't take the frantic scratching at and under the door. I leave the door cracked so everyone can come in and check on things while I get my 5 minutes by myself. They all seem mystified when I get out and stand there toweling off. Why would anyone voluntarily get sprayed with water anyway?
