The above pics were taken last year from a 5 year old Dominique hen who was an Internal Layer. This Coagulated Egg Material was retained by her most likely in the Oviduct for a time until it was expelled. Some of what you are seeing is the Coagulated Egg Yolk and the Albumen as well as the egg shell membrane or possibly the soft shell of an egg. Looking at the Volume of material I would say that it is more than one egg here. It was discharged form the vent, and she immediately went limp and died while I held her. Causes range from Genetics to an imbalance of the Calcium, Phosphorous, Vitamin D-3 ratio. Since I pay close attention to nutrition, there was nothing else I could have done. Just thought I'd post this as an example of internal laying.