The other night 1 remaining white guinea didn't go into the coop went on TOP of the Coop instead. The light was on inside coop and have a clear roof so light was shinning through and it was pitch black. So I got out the ladder and climbed up to the roof and tried to get her to come over but she wouldn't. I noticed she would occasionally open her mouth, like choking on something, but no sound came out. Not the coyote's started hooping and hollering down the hill about 75 yards from coop over fence, understand we live at 8800 feet in the mountains. Anyway she laid down of course in the direct center, so I tried to reach for her and the mouth started again. Then she stood up and as I reached for her she leaned forward spread her wings out and in towards her face to make herself look bigger and did the mouth thing but this time was hissing. Reminded me of the raptors on Jurassic Park, so has anyone ever experienced that before?