Hi all, I know this topic has been covered pretty thoroughly but I couldn't find an answer to a specific question...If my nest box is 13" high on the inside, but I put a 3 or 4 inch lip on the front to keep bedding out and eggs in, the effective opening is only 9 or 10 inches. So, if it has a 9 inch opening, but is 13 high x 14 wide x 14 deep once inside, is this enough for a bigger breed like a Dark Brahma, which will be (theoretically) my biggest hen...? The roof is also going to be pitched slightly because it is an external nest box, so it will probably slope to about 11 or 10 inches tall in back. Do I need to make it bigger? Thanks!