At what age do chickens begin to roost? I have 20 chickens (11 hens 9 roosters) about 16 weeks. They have shown no interest in roosting. I have built a ladder with the first step only 6 inches, second is a little more than a foot high, and two more with the top about 3 1/2 feet. Every night they gather in a corner to sleep but they show very little interest in roosting. Any advice?