Help! I have all age hens and all have stopped laying 6 days ago. I was averaging a dozen a day and wham! Now, I’ve got none. No one is molting. Checked run & coop and all is secure. It’s as though a thief in the night has taken the eggs? I used to go out by 11-2 every day & collect the eggs. I did introduce 6 young hens about a week before this started. I got them because my hens slowed down probably because of their age. Any theories?