I've had chickens forever! Even in my 3rd floor downtown apt when I was in college. We lost our beloved black stars last year to a huge swarm of gnats. They were in a small portable coop with a long cage run for fresh grazing. We came home from a short trip to town and there were my girls lying on the ground. At first I couldn't understand what got em! All three were there and seemingly not damaged so a rodent was out of the question! I would have felt better if so! For days I examined the situation and couldn't figure how it happened! Then I was gabbing with some local farmers and they all had lost their hens to a huge gnat outbreak! This year it happened again! I've sent reminder emails every year to my chicken holdin neighbors to protect their girls. Mine were the envy of the area because they laid faithfully every day of the year! So my question is what can I do to prevent this in the future!?! We now have a much larger coop and a large yard for the new hens I'm getting ready to purchase. Thanks and God bless!