Hi! We have 3 layers- 2 average one egg a day. 1 is a little....different. She can spend most of a day with her rear end low and walking more like a penguin than a chicken. She looks uncomfortable and doesn't jump or run as well as she does the rest of the time. When she does lay the egg it is thinner shelled with a lighter brown color and not as often as her sisters. Any suggestions? We use a commercial organic layer crumble. We've recently added oyster shells. They get a lot of time outside. Thanks!