Whenever my hens lay a soft shelled egg, somebody usually eats it and I just find the rubbery skin. I didn't really mind that as it didn't happen often. I figured that they burst the soft ones by mistake and then just kinda couldn't help themselves and as long as they stayed away from the normal ones it wasn't really a problem. Then I noticed my two old Cuckoo Marans (who are the worst layers I've got) hanging out at the nest boxes more than normal and looking very shifty. I thought I had been getting fewer eggs than normal, but I wasn't really sure. Last week I had a quick look in my nest boxes and counted ten eggs, but only found nine when I went to collect them a couple of hours later. I thought I must have miscounted, as the whole egg had disappeared, shell and all. Then today I found two eggs pecked open out in our straw shed. One was empty, the other was only half eaten. One of the eggs was from my young Cuckoo Marans, who had just laid it half an hour before. She was still hanging about the shed, also looking shifty. Basically, my Marans are eating eggs. Just them, no-one else. Are they known for this? They are the biggest, fattest and greediest of all my birds, and they're also the worst layers. Two of them are so old they're pretty useless, and the young one is rather intermittent. Is it worth it trying to cure them of it, or should I just put them in the pot?