We just finished building a beautiful coop for our 40 chickens, a mixed flock of Australorps, Javas, Welsummers and Cochins. They are 10 weeks old, and seem to prefer roosting in the pine shavings. We have two lovely roost bars, but they show no interest. Yesterday we installed a ladder, and this morning I found two of the Welsummers up on the roost when I brought them breakfast. Will they figure it out, or will I need to "teach" them? If I have to teach them, how do I do that? I appreciate your advice and help!