You'll have to leave it open for a couple of days, then prop it open slightly for a couple of days till they learn how to operate it themselves. The first day or so of using it themselves, they will freak out when it opens. It might take a week or so but they'll get it.https://www.backyardchickens.com/a/building-a-treadle-chicken-feeder
Ok, the feeder is neat and everything, but I wa t to know how he got that chicken to stand on that scale! Lol.