I have talked about this before but I need to address this again as I have had another lose due to this. First I know that there is a lot of post about this. I just want to go int o what I have happen and may it will help someone else and me. First some of you know I lost a Black orpington months ago due to being egg bound. After the death I had a vet friend preform a necropsy. He said that it was a genetic defect in the bird. Now I had I happen again. After the first time I have tried to do everything that I could to prevent this in my girls and also treated her as soon as I saw watch was happening. This case could also be because of the bird, she was the smallest of my buffs and laid the largest eggs. She did manage to pass the eggs after calcium dosing and lube, but the at that time I feel she probably would not make it. It was the largest egg any of my hens have ever laid. ( get somewhat graphic but no pics). The egg was covered in a lot of fresh blood and bits of tissue( lots of bits). I was surprised that she was not prolapsed. I cleaned her up brought her in and placed her in the sick ward. She did not look good. I was going to give her overnight and if she did not look better I was going to end the any suffering. To my surprise the next day she look much better. We all know how well chickens can hide pain and injury. The next day she looked bad and it was clear that she was not going to make it ,and did what was needed. She was my best layer. Are there breeds that are more likely to become egg bound. At this time I only have orpingtons, for now. This is going to sound odd but the neighbor had to 2 the same day that died because of this the same day. His vet said that stress could have caused this and to watch this. I was home that day and noticed nothing has anyone heard of this or know of any other reason for this. A side note my girls where in the coop cand run because of a laying outside the nest box. The neighbors have now got rid(re homed there girls).