I have 20+ hens, about 6 are laying now. They are all about 5 mos old. Handy hubby built nesting boxes for me. All are the same size and material. Four in the coop, six in the chicken yard and two under the back steps where they like to hang out. They free range from 7am until they take themselves inside about 7 to 7:30 in the evening for lock up. My question is this-- why do they all want the same boxes? I put wooden eggs in all the boxes for a hint. I went into the coop today and I had two hens in each of two boxes and two empty. If one of the girls is in the "favorite" box sometimes the others will stand there and squawk rather than use the others. What's with that? I did have one broody Cochin that sat her nest in one of the places in the chicken yard but not until she played musical nests for about a week. silly chickens!!