i am putting a sliding door for my girls to enter the run. it will be accessable from the outside so i can open/close it without going into the coop/run. however, i was wondering about cloth/burlap over the door. do i need anything to keep the wind, etc out? i thought about a doggie door, but not sure a chicken could push it open. ps - i am building a playhouse style coop with a nice size run.