Mama hen has had her 2 week old chicks outside all day for a couple of days now. Before that she had them running around in the coop, but not outside. She takes them back to the coop with the rest of the flock at dusk. She has taught them how to get in and out of the coop. Because she prefers to jump in and out vs. using the ramp, that's what the babies do. It's about a foot high from the doorway to the ground, but I watched her jump in and out repeatedly until the chicks caught on. Tonight I ran into a problem. She no longer wants to sleep shut up in her crate (in the coop) with them at night. She showed them how to use a low roost that we installed for the silkies. I'm scared! I'm not quite ready for her to keep the chicks out with the rest of the flock yet, overnight and during the early morning. I know mama will kick butt on any of the other chickens that get too close. The other chickens have learned that too. I thought she was going to kill one of the other hens today. So I scooted mama and the chicks back into their crate, which greatly upset mama. What do I do? Shouldn't the chicks be a bit older before they mix?