We got our first snow of about 2-3 inches today. My small (24-32 week old) flock will not leave the coop to eat or drink. I don't keep feed in the coop to reduce rodents and bacteria/mold growth. I only put it in the run/yard. A small part of their run is under their coop and they may free range 4-6 hours per day. Do I have to make a snow free zone, or will they eventually come out and eat when they are hungry?