It's alright, sorry I got defensive. It just felt like you thought I was some kind of monster or something for suggesting that, when in reality it really isn't so outlandish. But yeah I did say may need to cull. I guess I just wanted OP to understand the risk of her teaching her other hens to...
obviously not. I don't say that because of the calcium. Yes she can and should try to break the habit if she can and is willing to take the risk, I'm just saying this is what can happen, that the hen can teach others to do the same, and then you're left with a whole flock trying to break them of...
I've heard folks say that once a hen starts this, you won't ever get them to stop, and they may teach others to do it, so may be best to cull. I've even heard of folks having to cull their whole flock and starting over because they couldn't get any of them to stop.