Hi All - Coop construction going on at my house. I have a 23 inch space to put my nesting box(es) into. I have 4 Buff Orps. After construction, if I wanted two boxes, they would end up being 10-11 inches wide. Is this too small? I was thinking of making one laaaarrrge box taking up the whole 23 inch space. Would they share? What would you do?