Earlier I posted that one of my 8 hens is afraid of my rooster. At that time I didn't know why but i have now been witnessing him picking on her. He singles her out. If I am handing out treats he will chase her off. He really doesn't want her anywhere near him. They are 22 weeks old and have all grown up together. He is mating with some of the hens but I have not seen him mate with her. Does anyone have any idea why he picks on her?