For one year I've had my happy little flock of all girls. For six months I've had the bigger happy little flock of mixed-sex chickens. Today I have total KAOS. My four young roos from my Valentines Day hatch have turned this place into a living nightmare for my girls. They are acting as a pack and chasing down every female, young or old, especially poor Ruth. The girls have taken to hiding and can be found in packs hiding behind things. Ruth won't come down from roost because they go for her every time. My older hens have stated running away from home and going deep into the woods and now two have not returned, I'm afraid lost to predators. The roos are chasing them down, while they scream and run for dear life. While one holds her down the other three crowd around as if to say "When you figure out what to do, we're next." As of yet, from what I can tell, none have actually done the deed and the poor girl eventually escapes. There are piles of feathers everywhere now. I'm concerned that the girls are so scared - this looks very traumatizing - especially for Ruth. To make matters worse I have four younger roos from the Motely Crew drop off batch and two younger RIR roos. So in all I have 10 roos to my 35 females. Right now it's only the four oldest (4 1/2 months) that are causing the problems. But never having had roos my questions are - short of killing them: 1. Do they ever become gentlemen and try and protect and herd and court the ladies like I've read about? 2. Does this rough behavior ever stop or do the females just get used to it or learn to like it? 3. If I built pens and started separating the roos and wanted to add a few ladies for breeding purposes would they just be subjected to this trauma and unable to get away? I know this is long but I'm not sure I can deal with watching my calm little flock of girls being chased and terrorized like this. There's screaming and squawking going on all day long.