I am wanting to put my "chicken door" for the girls to come out of the coop on the floor. They would come out under the 8'x4' coop! I have searched for pictures of others that have "floor" coop doors, but not many do. Do any of you have pictures? Also what is the best way to prevent all my litter from falling out of the floor door? I was thinking of adding a small "lip" around the opening to prevent this... Thoughts?