I have 18 hens, 6 Rhode Island Reds, 6 New Hampshire Reds, 6 Americana's. All my Americanas are being pecked on at the tail base, one so bad the tail bones are showing! (sperated her). I caught one of the Rhode Island reds pecking her. Other than de-peaking, What can I use to put on these hens to stop this bad habit, before it gets worse? I tried useing Blu-Kote, but its not helping. Hens have plenty of room in hen house, 8 nest boxes, plenty of room for outside foraging. Greens are given everyday. I started them on Poulin layer then change to Layena.