Looking for suggestions here. A hens life is at stake! We have a sex-link red, approx 30 weeks old. Began laying about 30 days ago. She is one of 9 new hens we have that all began laying at the same time. Within the last 3 weeks we've had two "egg messes" in the nesting box (a wet mess which was an egg, entire shell gone). We've also had at least one rubber egg. In the last week, on two occasions we've seen the red eating a soft shell. I'm certain it's her own. The birds have at will access to oyster shells. So, question is, how do I fix her? We've dealt with egg eaters in the past, to the point that several were doing it and I had to cull the whole bunch of them. I'm not going to let this get out of control again. I don't want the others to catch on. In my opinion, the easiest fix is to kill her. But I'm open to suggestions. I appreciate any and all insight!