I've been noticing birds of prey around lately as I think more about letting my birds free range during the day. Sometimes when I'm walking around my property I notice piles of feathers, obviously from some small bird. Well just the other day one of my friends mentioned he saw a lot of crows around my chicken coop, and sure enough half the time I walk out there I see a crow fly off. Are they real threats to chickens? The ones around here are pretty big crows. I seem to get mixed results on google. For now they are safe in a covered run.