Greetings! I am new to this website today and new to chickens since June! I have 8 Black Australorps and I was told they would start laying eggs at 19-20 weeks. They are now 22 1/2 weeks and not an egg yet. They were free range but coyotes got two so mostly stay in, except for when I am outside and supervise them every few days for several hours. They are eating a layer feed, have fresh water, and a light in the coop from 5am-5pm. Am I missing anything?