I have a pretty serious concern that I need help with. There are two parts to the problem, so here is the situation. It centers around my australorp hen. I guess it really started when a neighbor's dog came into my yard and killed my rooster and one of my EE hens. I was fortunate that the other hen managed to get away and hide until I found her luckily before the dog returned. I got my Lolita [the austrlorp hen] and a barred rock rooster. It took her a while to warm up to them, and then a few months later some jerk swerved off the road and ran down the rooster while he was foraging in the front yard. After Rocky was gone Miss Houdini [easter-egger hen] started being very aggressive toward Lolita, and Lolita really took to my to protect her. I got a black silkie rooster [Shadow] and that was a very tense day. She attacked him to the point that I had to pull her off him and separate all three for awhile, as I had already had Lolita and Miss Houdini separated from before. After some more feathers flying she and Shadow made peace, but he was very aggressive toward Lolita, to the point more than once I would have to chase him away from her. Things seemed to settle down until lately. I noticed that Lolita was nowhere near as active and would fall asleep almost constantly. Things got very bad late last week, Both Shadow and Miss Houdini were attacking Lolita non-stop to the point that I kept her in the coop unless I was holding her. I did get two more hens to keep her company. She is lethargic now, and watching her I am wondering if they haven't blinded her. She will only walk from one spot to another nearby spot, she is still eating but not like she used to. I know something is wrong when she won't eat from my hand, isn't devouring the watermelon i put out for them. I noticed that they tore all the feathers from the back of her neck, which I am wondering is the reason that she often will put her head back and shake her head and neck from side to side. She isn't acknowledging the new hens even though they will approach her and one will groom her. She is so withdrawn. Tonight Shadow and Miss Houdini got into the fenced off area and were both attacking her again, and he was getting aggressive with the new girls too. I caught him and locked him in a pet carrier and placed it in the area that the girls have for roaming, even after this Miss Houdini was still attacking Lolita. So I now have her closed in the other chicken coop. I am really worried about Lolita, I really don't see any physical injuries, other than some missing feathers and a few small spots where blood was drawn. I have been putting an antibiotic in their water that I got from tractor supply since Saturday. I am also wondering what to do with Miss Houdini. I don't want to get rid of her as she is my oldest girl and last of the original flock. I am still debating on whether or not to keep Shadow. My only worry about getting rid of him is the fact that he and Miss Houdini have bonded.