History: I have a mixed "teenage" flock of 8wk olds that, until this past weekend, were brooded in my horse trailer. Once they were fully feathered out, I moved them to a grow-out pen. Flock composition and feed didn't change (medicated chick feed), except for the lone silkie that typically lives in that pen (and it just occured to me, as I write this, that she may be the problem). Anyway...now, they are picking out the tails (and literally, the innards) of several chicks/day...and, obviously, killing them. I lost two today alone. I can't keep losing them like this! It's only been 5 days since I moved them out there...didn't have this problem at all in the horse trailer. What is going on? Should I remove the silkie and see if she's the problem, or if she's at least starting the problem? Or have I likely raised a group of cannibals? I should add...I removed some of the more valuable birds from the group when this started, and put them back in the horse trailer...and they are fine. No cannibalism there. What gives???