I need some help. I have 8 RIR that are about 2 1/2 years old. They have always been excellent layers, but for the past few weeks they have been eating the eggs. I've tried fake wood eggs in the box, filling an egg with mustard, oyster shells, ect. Its some sort of frenzy. They eat it shell and all. I dont mind losing an egg here and there, but I havent had eggs in weeks. Is there a way to stop this? Or is it time for chicken soup?