I have a broody that just hatched out 7 eggs. They spend most of the day running around in the cage with mom. Mom seems restless and tries to get out of the cage. The cage leads to the coop through a small door, then outside to freedom. At what age do the chicks have to be before I open the door and let them and mom out? It is quite a journey from the cage to freedom. The cage door is 24" above the coop floor. Just below the cage door is the door that lets the chickens out. I have a ramp that droppes 3' to the ground into the run. I will have to install a ramp into the coop for the chicks to climb down to the floor. All opinions are welcome. Thanks John