I've seen coops with the inside painted. Is there a danger of the chickens ingesting the paint and getting sick? I live in the south where flies are an issue in the summer. I've heard that painting the inside of a horse/cow run-in shed dark will reduce the flies in the enclosure. Has anyone experienced a reduced fly population when the inside of the coop is painted a dark color as opposed to white? What is your experience with painting the inside of your coop? Color? Thanks!