This is a silly question, but I am curious. Usually my girls are very orderly about egg laying -- they politely take turns using the box and have pretty much gotten used to the routine. This morning, a couple of weird things happened. One hen stayed upstairs when I let them out, and when I when I went to check later, expecting to see an egg, there wasn't one. Then, later, I looked out to find that they had both gone up to the coop, something they haven't done since they first started laying about a month ago. They were just up there scratching and tut-tutting aimlessly. Then, a little later, I let them out for a free range, and I suddenly saw a shell-less egg on the ground near them. This is the first time this has happened. I know I don't necessarily need to worry about the shell-less egg itself unless I start seeing them repeatedly, but I am wondering whether the occurrence of the egg would have influenced their earlier, slightly wacky, behavior. Again, silly, I know, but I also know that we are all curious about the odd things our girls do! While I'm asking, also, I've been continuing to feed grower crumble along with free choice oyster shell rather than layer feed, according to advice I've received here. But is the shell-less egg a sign that they need layer crumble now? Should I mix the layer and grower together for a while? They're only about 7 months old and seem to be doing well on the grower crumble, so that was why I was continuing to feed it, plus some have said that they can get too much calcium from shells plus layer feed.