So far Ive just got a few old Rabbit boxes sitting around that the chickens were laying in. Im getting ready to build a "wall" of chicken boxes, was ganna go 3 high and 4 across. With each box being aprox. 10" x 10". Does that sound right? With a 2" lip or so on the front to hold in bedding. This will give me 12 boxes I have 13 hens but Ive been told that some will share nests. I have 4 Idas and 9 Barred Rocks if it matters.