We are new to the chicken keep but have done some research and got some advice as well. We build a new spacious coop with Nipple system and PVC feeding system. Got new chicks that were 2 weeks old and we started. Everything was fine we had 7 chickens. One night a racoon got in the coop and killed my favorite gal. So we were down to 6.friend of mine heard and offered me a free chickens. 5 older (2 yrs old) hens. They are black and red sex links. Our Littles are orpington. My friend just said putput them in the coop together for a week and they will figure out the pecking order. Well after 4 days of absolute terror my poor Littles look sick have diarrhea and are terrified of the old hens. The old ones won't let them drink or eat. My Littles only cower in a corner all huddled up. The old ones haven't yet figured out how to drink out of the Nipple system so they were without water for 3 straight days and it's 90 +. I finally put a tub full of water for them in the coop. I have also started on day 2 letting ours go in the run so they can eat and drink in peace. I have read somewhere that if hens bully to put the bullies in a separate brood box. So we did. We put the worst 3 in the brood box. It's a see through box and it's in the coop. I am worried of the outcome. Help or I just may have a 5 orders of chicken soup.