My hens began laying about 3 weeks ago. We're averaging 2 eggs per day. Pullet sized to start, but forming larger this week. Usually I find eggs between 9 am-Noon. This morning at 7 am I found 2 eggs, on floor, not in the nesting boxes, very thin shells, broken. I have 5 chickens who would lay brown eggs, so not sure who. Thoughts? Thank you!