My babiesa re at least 3 months old now probably older since i didn't know how old they were to start with.. but they are flying and such. Two got out the other day and only one returned. and it wasn't at night it was the next afternoon. I think they couldn't figure out how to get back in the coop. How do i train them on how and when to come in for the night? Preferably without losing them all in one fell swoop. Crystal