I have a coop and run with two roos and a pullet in it. Recently one of the roos, around three months old, started "eating" the grit. He actually goes for the grit over feed and even treats like fresh greens. Now the other roo is following his lead and they are both trying to eat as much as they can and as fast as they can. The pullet isn't as bad about it. I give them free choice chicken grit from the feed store, but have cut them back now because they are eating it even over their feed. I even tried mixing chick grit and regular grit in case it was the wrong size for them, but they just ate both. lol I have another coop and run with my older chickens and they don't do it at all. Has anyone else had this problem? Any ideas how to stop it? I hate to cull both of the roos because I wanted one to keep.