Hey folks....I'm building my first coop/run. I'm using asphalt shingles on the roof over the run, and I was wondering, do I need to worry about the roofing nails being exposed on the underside of the sub roofing? In other words, do I need to worry about my birds flying seven feet up into a solid roof, and impaling themselves on a 1/4 + inch of exposed roofing nail? Probably a dumb question, but I'm brand new to this.