I have 7 hens, 5 of laying age (about a year old) and 2 newbies (not yet started,only about 5 months old) and one roo. This spring we moved the 5 into a bigger coop and they have a large run instead of running loose in the yard and there was a big drop in laying. Then in June we added the two newbies and they all quit laying...all but 1. It has been like this for months. I'm so sad. I have checked them for worms and mites and all that stuff. They all have good color and are active. I think I just made them stressed and maybe mad. I have read new birds and new housing will do this. So is there anything I can do to encourage them to start laying again??? They are pet chickens and I want them to be happy and not stressed. Also, with no sign of illness should I treat them with some antibiotics anyway? Just in case it is some sort of sickness that has caused them to quit. Thank you all so much.