Thank you all for your responses! So far as age being a factor, I know that these are in fact young, they are only about 30 weeks old now. Yes, one is sick, but she is isolated. If the others are sick, there are no symptoms. No runny noses, no coughs/sneezes, normal poop, they eat like little piggies, and seem very active...at least when I enter the coop, lol. I am just really frustrated. You see the birds and they are so pretty and you hear such good stories like most of you have reiterated and you think it's just the perfect chicken and instead I get chaos in my coop disguised as "techno chicken" from Youtube.
It wouldn't bother me so much except that these demons have turned all of my previously good natured birds against me! My flock before this was calm, inquisitive, and predictable. Now the moment the door to the run or coop opens it's like there is a frenzy to run, fly, squawk, escape! The big mean woman is hungry! We must all heave ourselves at the ceiling!
I do agree that the commercial farm upbringing probably has something to do with it, but on another note, the Gold Comet I mentioned earlier today actually came from the same farm on the same day and is the most laid back chicken I own. Her name is Charity and she is the only one who does NOT go into a panic upon sight of me. I usually have to nudge her out of the way of the door when I arrive, lol. Also, she laid her first ever egg nearly two weeks ago and hasn't laid since, but unlike the leghorns, she was only 18 weeks old at purchase (22 weeks approx now) so her not laying again yet doesn't stress me because she was awfully young to start anyway. I wasn't expecting her to lay at all yet when she did, but she is only my second brown egg layer and I got one large egg from my BR one day and found a smaller different shade of brown egg that same day and she is the only one it could have been from.
I don't hate all white leghorns. I really like some of yours, lol. I just thought I maybe would get something similar to what you all seem to have. I truly think I am done with the breed after this experience. We were planning on building two more coops/runs in the spring. One of brown egg layers and one of white but this whole scenario has made me decide that I like BRs and Gold Comets best. BRs for their dependable laying, and Gold Comets for their gentle temperament.
My Pharoah quail, who I never intended to keep but fell in love with, is sadly my best laying hen, LOL