We have 15 hens in an 8 ft. by 8 ft. coop with a 16 ft. by 16 ft. run. We also have a rooster but he is seperated from the hens. They are all Australorps and 18 months old. We were getting 10 eggs a day in December-January. Now we are only getting 4-7 eggs a day. They don't appear to be broody or eggbound. They should have finished molting in January, but 3 of the hens do not have all their feathers back. They all appear healthy except for the hens missing feathers. We have a very dominent hen who lays eggs and acts like a rooster and even hops on the hens back. Maybe she's putting to much stress on the hens? I was also wondering if possibly they might be sick. Please ask questions 'cause I might be able to guess the answer if you remind me of something I didn't do. Thanks in advance!