My hens turned a year old in March. 3 weeks ago they turned into crazy chickens. Exhibiting same behavior that you mentioned in your post in Sept. 2010. What happened to your chickens? Did they return to nice hens or did you have to chop off their heads?
I have a flock of 12 hens and 1 rooster. Last week the very same thing started happening to one of the hens. She's constantly being harassed by the others. I have removed her from them. She's on the backporch in a chicken hutch by herself and she loves it. I work so she's in the hutch...
It's difficult for my debeaked chickens to peck anything hard. I feed them crumble and pellets.. which they seem to scoop up w/what's left of their beaks. Also, they like grapes, bananas and bread. They do clip grass and clover off with what beaks they have. My hens look like yours...