Weather got really nice so we have been letting our 4 1/2 week old chicks into their outdoor run. They love it. They are in and out all day long. We herded them in at last light the first night. Last night we let it get dark and had a light in inside so they could find their way in. We found them huddled in a pile outside and had to pick them up and put them in. Will they learn to go in on their own? I thought it was kinda a natural instinct.