My hens, all 1 1/2 years old, have started this bad habit....of picking at each others feet scales and eating them. It all started a few days ago when I caught one hen picking them off of herself and eating them. She became obsessed and picked EVERY scale with in reach, off her legs and feet. She did not stop there and was picking at what was left underneath all these scales. Well, the others got wind of this and are not only picking THEIR scales off their legs and feet, but are biting at each others feet and legs to get their scales off and eating them. So I tried wrapping their feet, but I was unable to cover all the scales on the toes. Then I tried using Blu-kote on everybody's feet so they all looked a uniform purple. That worked for about 5 hours, and they went back to biting each others feet. So now I am working with Pine Tar. But it does not dry very quick and everybody's feet are covered in dirt. So I am not sure it will work. I checked over their feet, and they do not appear to have leg scale mites. All the scales are laying down and attached, although they are a bit rough looking. The feet are smooth and don't appear to have anything wrong with them. So why are they doing this? Are they lacking in protein, vitamins or minerals? They have huge spaces to wander around in, and only do this to each other when standing around together. They have free choice oyster shell, clean water and constant layer feed available. What do I do?? I don't want them to get to the point of blood shed. Thanks.