Our chicken yard is complete with the exception of the electric fence which we have begun but not completed. The bottom of the fence is galvanized hardware cloth, and extends 2' out on the ground. The top portion is galvanized poultry wire. The top of the run is covered with bird netting but will eventually be switched to one of the wire products. Our chickens go in the coop by themselves at night, but all CRAM at the door opening - I'm assuming they like the fresh air, etc... So far I've been locking the chicken door at night even though they fuss like crazy - obviously preferring the door open. ONCE the double strand of electric fence is up around the entire perimeter of the fenced yard, is it okay to leave their door open or am I just courting disaster?