This morning we had a scare. I went out to let the ducks out of their pen. They free range during the day, and are penned up at night. I had to leave this morning and I let them out of their pen and heard a hawk call. I looked up in the trees and couldn't see anything. I stood there for a bit My car had some condensation on the windows so I got in and turned on the wipers. As I was in the car I saw hawk swoop down, the ducks ran, and the hawk flew back up and landed on the roof of the house. I jumped out and stood in front of my car, the hawk flew back up to the trees and landed on a branch. I then turned around and saw the ducks huddled up near the entrance to their pen, so herded them back in and shut them in. I know they were scared since they actually let me herd them right after being let out. Normally that would never have happened. haha. Then I saw it fly off. I was gone for about five hours and came back and stood there looking in the trees and listening. Didn't see or hear anything. Let them out, and noticed one of my Pekins laying down with his beak under his wing. He stayed in for a little bit and I crouched down to get a better look and he was looking at me but didn't move. They are all very skittish so this was my first concern. He did come out and I emptied their pool and refilled it. He hasn't drank any and just stands there, closes his eyes for a bit and then tucks his beak under his wing. All the other ducks are acting normal. What could be wrong?