Thank you all for the replies. I will look into a protein supplement at our local farm supplies shop and ask them about it. I can't help wondering why just one would have that need. This hen was one of three different brands of hens, same age, purchased from the same farm at the same time. Anti Pecking Spray - we have sprayed until we are nauseated at the very thought of it. When people say that it lingers, boy, does it linger. Boredom is a difficult one to determine and I will think about that; they have approx. 50sm of irregular shape, with a couple of small trees, a small hill, an indoors area, compost, and varied terrain between 5 hens. They certainly aren't ever crowded. Chrismahon - I think your photos were some that we looked at before fitting. Very helpful, especially in seeing just what bumper bits ought to look like when fitted. Perhaps we need to persevere with this method. Is it possible that we didn't get it in exactly right? Its hard to know, especially when we pulled at it quite firmly to test it. The pecker seemed to get her toe in it to pull it out. We had soaked it in hot water first to soften it a bit. Maybe not do that next time? Tricia