What's causing the picking/pecking? Overcrowding in the pen or inside the coop can attribute to picking/pecking, inadequate protein in their diet/feed, external parasites, boredom. Coop/run expansion will eliminate picking/pecking. Adding gamebird feed contains a higher percentage of protein than regular feed. Add it to their diet and the picking/pecking will eventually slow and stop. Inspect them top to bottom for external parasites, inspect inside the coop at night for mites crawling around, use a flashlight. Hanging a head of cabbage in the run/pen will also eliminate picking/pecking. If all this fails; put Vicks Vapor Rub on their necks or purchase Rooster Booster brand "Black Salve," dont purchase Rooster Booster "Pick No More."