Now that you brought up the shifting,I took a hard look at all my blrw.
I would like to look into that more. I noticed 2 of my original 5 pullets ended up being egg bound. Is this something others have noticed with the blrw? Thanks all.
I doubt that it breed related. You may need to address the calcium levels in your hens.
http://hoeggerfarmyard.com/calcium-the-key-to-beautiful-eggs-and-healthy-hens/