As I see it, if a few of us here at BYC are willing to offer up our flocks as test cases for Forco, the rest of you have nothing to lose by coming back to this thread from time to time and checking to see what, if any, developments have occurred. It's been maybe three months that my flock has been on the Forco supplement, and I see no problems developing, and mostly positive results.
My worst feather picker Flo has mildly reverted to her bad behavior the past few days. It's nothing like it was before, though, where she engaged in a frenzy of running from one hen to the next yanking feathers. I have a hunch she hasn't been getting her share of the Forco scoops I provide each morning. This morning I gave her her Forco segregated from the others, and will continue to do so until I see her improve again.
If we can experiment with this supplement and we can report continuing success with no ill effects, it could be a real break-through treating the problem of feather picking.
By the way, my flock has been eating a 50/50 mix of layer feed and flock raiser feed, and it had no effect on their tendency to pick feathers. They have also sported peepers, and that only solved the problem in half of them, the others adjusting to the limited vision and snatching feathers anyway. This really is a last resort for me. I've tried everything else.