My hens have been like clockwork going in at dusk. The last two nights they just stay outside and curl up close together on the perch. They are in an enclosed cage but I don't feel safe leaving them in that over night. Does anyone have this problem? if so, how to you re-train them to go inside at night? The only difference is that my husband put up a new perch in the enclosure and they seem to really like it. Should I remove it?