I have a question. I found these awesome coke bottle crates thats I got for free and I want to use them in my nesting boxes thinking it will give any broodys room later on, and they are probably 12x18. I was going to make my nest boxes then around them 12x18xabout 14 high... I was going to turn the nest boxes two different ways if that makes sense tho...so one is wider while one is deeper figuring that gives them options. My question is, is that too big? I;ve read now that too big is no good because then they'll just lay anywhere. Whats your advice on this?