I don't remember what age for the last batch, but they were a few weeks old.
This morning, I went into the garage, and two of the six 11 day old chicks were on their tiny training roosts, with the others asleep on the sand floor. I don't know how long they had been there, but it lasted 30 minutes more. I was amazed that even if not all night, a couple are beginning to get it at that age.
I have noticed that the two Olive Eggers and the one Welbar are much more agile and have been on it during the day 10x more than the three New Hampshires. The NH's are like little kamikazi chicks. They will take off then not have a great descent and land on others. Or over shoot the roost and faceplant on the other side.
What a hoot these little creatures are to watch.