All of mine have been trained to the words "bedtime." My birds (chickens, ducks, guineas, turkeys & geese), all 125+ of them, are so used to the routine that my 6 & 10 yr old children can put each pen to bed without assistance. They see my kids heading their way anytime after 4pm this time of yr & they head for their coops & boxes & wait to have the door closed. Their usual bedtime is 6pm in fall/winter & 7-8pm in spring/summer.