I have two ISA browns and one barred rock in a coop with one nest box. They will be two years old in march. I am finding a cracked egg for the last three weeks on the poop board under the roost. It is a little on the soft shell side. They all eat layena and I sprinkle a little calcium on there treat of cooked oatmeal. Anyone know why this is happening? It is one of the ISA browns doing this. It looks like she is droping her egg when she is on the roost. I don' mind losing the egg, just don't like the mess it makes.