We have a flock of 30 hens (various breeds), a Silkie rooster and we had a RIR Rooster (Craig). Craig became VERY aggressive so he had to go. We still have the Silkie Rooster and he's very happy to be king of the roost. Note: no change in feed or housing. We do however have a new chicken run outside which they didn't have before. They are not left out for long periods of time because we live in a rural area and there are natural predators around us. The hens are allowed out a couple of hours each evening (longer on the weekends) and are always put back in the coop at night. Since Craig's absence the hens have started displaying all sorts of odd behaviors and I'm at a loss on what to do... About 5-6 of the hens are molting at this time so they have exposed areas ~ some of the other hens have started sever pecking which then gets the rest of the hens into picking at the sores and has ended up in cannibalizim (they have killed 2 of our hens this way and injured another today). This happens VERY quickly...in only a few hours. (has occurred over night or from a.m. feeding to p.m. feeding) The offenders vary and are relentless. We of course take the injured hen out as soon as we see it but by then it's usually too late. Now this doesn't happen daily but enough to cause us great concern. 2 of the hens have started climbing as high as they can (we have roosts of varying heights) and dive at us when we walk in the coop. (Craig did this to me once which happened to be his last chance.) Egg production has dropped from nearly 2 1/2 dz. a day to an average of 6 a day. I realize when hens molt they don't lay as much if at all but like I said there are only a few molting at this time. Any ideas on what is going on? This is the first time in 2 years of raising chickens we've had any of this type of behavior and I'm not happy at all. I don't understand why all of a sudden things went to heck. I read about "activities" to keep them occupied during the day. What type of activities should I add to the coop? I read a post about hanging up twine which I can do but what else beyond that? Do we need to buy another full size rooster to keep these ladies in line?