OK - so i started my coop today! i just build the frame until i can get the plywood then ill brace it etc. I have 10 RIR hens that are just a little over three weeks old. the coop dimensions are 8 feet long, 4 feet wide, 4 feet tall, and the floor is 2 feet off the ground. I'm sure i'll have a bunch of questions as i go along, but my first one is does the nest boxes have to be off the floor? i know the roosts have to be higher than the boxes, but how high do the nest boxes have to be from the floor?