I keep finding soft shell eggs in my coop i have 3 reds that are laying 3 regular eggs a day 2 marans one was laying then went half broody and stopped laying the other hasnt laid anything yet shes the youngest maran. How can i tell which hens laying the egg with no shell. Also its always laid in the sand bath under the roost never in a nest. Most all of them are busted I've only saved one that didnt get busted i found another this morning that was busted.