Hello, I have 20 Birds, 15 older ones, I think 2 years old and 5 are 6 months old and not of them are laying. I have done everything I know and I cannot get them to lay. 1. Changed out the nests 2. Wormed them 3. Increased feed 4. Added Roosting space. 5. giving the right kind of feed 6. not molting They are free range chickens and I know they are not laying in the field. They don't appear to be stressed. The older chickens were given to me, when a predator took me out. The fact that the new chickens are laying by now is puzzling. PLEASE HELP!!!