I have three ISA Browns. 2 of them lay consistently, every day. They are also preferred by the roo as told by some feather degradation on their backs. But I have three hens and only get 2 eggs a day. The third ISA is generally left alone by the roo. She sleeps on the far end of the roost away from the other three (roo and 2 laying ISAs) Do some ISAs just not lay? Why? I've put her in a separate place to see if she's laying but just hiding them from me. 1 day in, no eggs (but the usual 2 in the coop nestboxes) but I figure I'll keep her a couple of days in there just to see. But why would this happen? Or does it just occasionally? I rather thought all hens would lay, eventually. Especially a laying breed like an ISA. The other two are regular as clockwork to the point where, if I pasture them earlier than usual, I know when - exactly - to go out and get my eggs.