Hey, this is a rather serious issue that I've been dealing with since about Nov. of last year. It all started when one of my hens died unexpectedly, which was ok at the time, since I own over 100. But the other 99, they must've been curious, because they pecked her until her insides were nearly hollowed out; & then I found her. This progressed until I felt like I was losing them all the time. They had to have gotten a taste of blood and became addicted, and so now about 90% of my 100 chickens (I've replenished the dead with new ones since) have a decent amount of their feathers missing at the base of their tail, exposing their skin. Some of them are starting to grow their feathers back it seems, while others just seem to be going with the flow, running barebutt, with no injuries whatsoever, & others still you can tell if they've been pecked because their skin is red & irritated, with minimal or no blood at all. Around halfway through Dec., I realized I had to do something, so I bought Rooster Booster from my local TSC. It's supposed to help treat & prevent cannibalism in poultry. After using, I noticed improvement. Any other suggestions for how to treat this if things get ugly again?????