Flock block promotes more fighting, that's one more reason why I don't like it. It's a small thing that everybody is trying to get to at the same time, so the pushier chickens will hog it and not let the others get to it, and can get defensive and peck/pluck even more. If you give them treats, the kind that you can scatter over a large area, or have several stations at a time, are much better for spreading the flock so they aren't fighting over a limited resource (or a limited area from which they can reach the resource).