I put my 18 eight week chicks mixed flock outside for the first time two nights ago. They have been living in the same coop but it was in the garage. Yesterday was the first time they were outside and everybody was a little tepid besides the 2 that could care less. Today they warmed up to it and everyone was out. I went to lock them out for the night and one girl was just kept making a call. I checked her nothing looked wrong except her crop was quite full. Then I noticed most of them were..so no biggie. I tried to shoe them into the coop nobody wanted to go in. Once I got them in they were freaking out and piling on top of each other, I couldn’t calm them. I checked for predators in and around and nothing. Freaked me out. What is up with this behavior?