My Buff hen started laying about a week ago with no problems and very little behavior besides a bit of singing. One of my barred rock hens, I suspect, is about to start laying but her behavior is so weird and I'm not sure it's normal? Screaming loudly, pacing from coop to nesting box to roof of the coop and back again. Scratching her nails in the nesting box to the point that they have started to bleed (afraid the other girls will pick on her because she's also bleeding!) and then she will sit for a few minutes screaming. Then it all begins again. I'm guessing she's going to start laying but you don't suspect she's egg bound?? Is this behavior normal??