For the past week my Columbian Blacktail,Abigail, has been laying huge eggs. The photo shows her usual on the left. We've had 3 like the larger since but with a spot of blood on the shell.not a lot though.Hubby and I had been assuming that it was because they were large. She had a spot of blood on her vent (which is bald) so we bathed her(which she loved)separated her and gave her yoghurt with calcium boost. She has been eating and drinking happily but this morning when I checked her the was no shell just the egg contents.ive bathed her again but don't know what else to try.