I have a single hen laying very thin shelled eggs that break in the nest. I’ve done all of the things to correct it but I think her egg laying machine is broken. I saw her on camera but I have 3 others of the same breed. I’m planning on putting each one in a large dog crate one at a time to see if I can figure out which One it is. Do you think she way lay an egg in the crate? Anyone else know how to isolate a hen?