Hello. My chickens free range in my fenced yard all day. Today I heard some commotion and came out to a hawk sitting on the fence. He flew off as soon as I came out. My girls were justifiably scared and ran to hide. But one of my 4 is now missing. I don't see any sign of an attack (feathers, etc) and have read that hawks are not normally large enough to carry away a full grown chicken. My missing girl is an excellent flyer (despite having clipped wings) and has flown over the fence before when threatened. Am I being overly optimistic to think she "flew the coop" and is hiding?? Is it possible she could've been snatched up by a hawk with no sign of struggle or attack?? No sign of her for 3 hours now. Thanks in advance.