I cant understand this. I only have 4 chickens, at the moment, and haven't had more than that for years. I seem to have a lot of flies and can't figure out why. The girls are almost never confided in their run so there's not lots of consolidated poo and the flies are in the yard, not the coop, which isn't overly messy. The flies seem to be hanging out by the chickens' food, but, clearly, they aren't breeding in their food. There's no garbage lying about and I'm a vegetarian, so there's no meat in my garbage bins. This isn't a new issue and I don't smell evidence of a dead animal anywhere. I have a compost bin, but no evidence of fly activity in it. They aren't on the edge of the property, so I don't think they are coming from the neighbors. I just can't think where they may be breeding. Anyone have thoughts?