I have a LF Partridge Rock that relentlessly attacks my Dutch Bantam. The LF will jump onto the Bantam's back with both feet and grab her by the feathers on the back of neck and repeatedly yank her. They are both hens and the Bantam is lower on the pecking order. Last night the LF jumped up on the shelf where the Bantam was sleeping and stood on her head. The LF is sweet to humans and is normal to the other hens but she is awful to that one Bantam. I will put her in a 'time out' cage but this only stops for about 30 mins after she is let out of the cage. Does anyone have any suggestions as to how to correct this problem?