We got a variety of chickens this year. 3 RIR, 3 BR, 4 EE, 2 BSL and then a couple weeks later we got 2 SLW. The main group is 16 weeks old now. When should they start laying?? We're so anxious for them to lay. Will they lay in their hen house or will they lay in the bushes where they've been resting during the day?