So, i have a flock of 16 chickens. 3 roosters, 13 hens(black austrolorps). i have had them a little before my birthday and they are around 18 weeks old. anyways, i put in the roost for them today and they weren't using it tonight. i know that it'll take time for them to use it, but how long can i expect to wait till they start using the roost? Also, how long until they start laying? i heard that they do at about 16 weeks but they are 18 weeks now and i haven't seen any eggs.