My chickens do not free range and have a large run. When I got home from work today, my son told me the girls stayed in the back part of the run and did not run to the door. If they hear anyone approaching the run, all 6 of them are waiting at the door to greet them. Sure enough, when I went to see them, none of them ran to the door and all were toward the back of the run. They were also very cautious. I'm sure something spooked them. I guess I'm concerned about how long it takes for them to return to their normal behavior. I hate seeing them like this. They are super friendly and none were interested in any attention from me today. How long will they remain spooked?