After 9 months of manually opening and closing my chicken coop and run I have purchased an automatic door. I let my girls free range our fenced backyard and am wondering if I need to lock up the run at night. The automatic door should keep them safe in the coop but I am concerned about making it easier for predators to get to the coop and if their unprotected chicken feed is going to attract attention. I am in the center of a small college town so our predators are raccoons, rats, and opossums. Is it okay to leave the run open all night?