i have 6 chickens that are all almost 6 months old the live in a well ventilated, dry and secure yet not so lovely first construction attempt 5'x5'x5' coop inside a huge run complete with permaculture compost pile. they free range out through the yard for several hours most days. they want for nothing. 2 months before they were expected to start laying i put in 3 well constructed nesting boxes each measuring approx 12"x11"x10" with a 3 inch lip in the front and a roosting bar 4 inches in front of that. our first eggs came early - actually 2 weeks after i put the nesting box in. every few days we had more. all the nesting boxes were being used. we find 3 different in one box on some days. but the past 2 weeks, i have 2 layers who refuse to use the boxes. both are the last hens to start laying. one (a plymouth rock) lays next to the nesting boxes in a small space between the boxes and the big people door, not a big deal. but one of my ameraucanas is laying in a far corner under the big roosting ladder in a pile of poop. it's gross. how can i get her to lay in a box? should i add more boxes? shouldnt 3 be enough for 6 chickens?