We have two Rhode Island Red hens a bit over two years old. Both did their first molts over winter. At that time we had trouble with thin shelled eggs, which I gather is common during the molt. Lately, we've been getting thinnish-shelled eggs that are white and really have a rough surface. This is intermittant. Lately, we've found shell-less eggs under the roost bar and after a bit of investigation, determined they came from Peaches. Within the past couple of days, Peaches has had two incidents of laying broken eggs, one discovered just last night and one on Friday during one of our "flock walks" where she suddenly sat down in the grass, wouldn't move and ended up laying this broken egg. the other hen, Phoebe, really went after it and was actually pulling the egg-gunk out of Peaches' vent. Peaches is behaving normally and has her usual amount of energy and appetite. I plan to have a look at Peaches this morning, clean her up a bit and think about what to do. In perusing various sources, Egg Drop Syndrome comes up and fits most of the symptoms to a tee. I wonder if a thin shelled egg can break inside a chicken that perhaps a little to active while carrying the egg? If I end up digitally probing her vent, is there any special lubricant I should be using? We were thinking of olive oil. We don't really have much else in the house except for some Vaseline. Peaches is the sweetest little chicken and we are really worried.