Thats a hard one, just never know what their reaction will be. I let all my fowl out (chickens, peacocks, guineas) and they go back into the coop before night fall. If one or two seem oblivous to the routine, I can usually coax them back in with bread crumbs. Maybe start hand feeding them and leading them around in a controlled environment prior to letting them 'fly' the coop on their own? However, I usually won't let chicks out til they're about 6 months old. Good luck with them.