have a 9 month old pullet who has been laying regularly. For the past couple of weeks I've found broken eggs on the coop floor. I was assuming there was an egg eater in the coop who had knocked them out of the nest box. Then I realized she was laying them on the coop floor. A couple of days later I found broken eggs right under the roost bars. Today there was a broken egg on the roost bar! Who lays eggs while they are still in bed? The first eggs seemed normal, these ones are definitely thin shelled. She gets free access to oyster shells and has plenty of calcium (yoghurt) weekly. Any suggestions?