We currently have a flock of 8 chickens. We have a Wydandotte cockerel / rooster that is just now turning one year old. We purchased him along with a batch of "guaranteed" pullets last Spring. Our other rooster had died months before, so we thought it was great timing for this pullet to actually be a Roo. We've only had mild tempered roosters in the past, but this ones behavior has us concerned. He has been chasing some of our hens relentlessly, then grabbing them by the comb and aggressively pulling on their combs in attack fashion, not even mounting them. He tore off one of our hens combs after we found her hemorrhaging and weak on her perch in the coop. We separated her and nursed her back to full health, but now he is showing this same behavior towards our other hens. What's even more concerning is that one of the other hens is helping him and mimicking his behavior. Both he and this other hen will chase down and capture one of our other hens, she will join him in pecking and pulling on the comb of the other hen, and even mounting the other hen. Is this healthy chicken behavior? Whenever I hear kerfuffles going on, I see this same behavior, our Roo and his hen companion attacking another hen in this fashion. This seems to be happening several times per day. Our Roo doesn't seem to be aggressive towards us, but we don't want this behavior to escalate as he gets older. We've raised chickens for years and have never seen our chickens exhibit this type of behavior. Our chickens get let out everyday to roam the property and free range, so they're not cooped up during the day and their coop yard is 60X20 with a coop on each end which allows them plenty of roosting options.