Just read on another post that pecking on the back could be a lack of protein, I have a hen that has just started this with one of my other chickens...only one of them. What should I feed to help with this...to add protein? And is this the issue? They have never had a problem before have always gotten along great....but now Maude has turned into a stalker and just jumps on Sophie for no apparent reason. Any help would be greatly appreciated. Thanks all!! I also have a new one coming that they have been introduced to but not part of the group yet...could that be part of the issue?