I have a hen that went broody in March. She hatched and took care of her babies and has been back to laying for a couple weeks. My problem is that I've been getting less eggs than normal, and I've had eggs go missing from the nesting box. I just saw my broody run out of the coop with an egg shell in her beak. There was still a yolk and white in the nest box when I checked but the entire egg shell was gone. They have oyster shell for calcium supplement so I don't know what could've caused this to start.