I found this egg on the poop board this morning. It seems someone laid it while on the roost. I have never, ever seen anything like it before. It is large and rubbery. It is yellow and looks to have some blood on it. When I cut it open, there was a bunch of brown stuff inside and it smelled to high heaven. I am not sure I have ever smelled anything this nasty before. I have no idea who laid this as we have 20 chickens. They all seem to be fine. Nothing unusual. They all got done with a molt recently and are actually looking great. No one is acting sick or weird. Laying has been down as is normal for this time of year, but never in 12 years of chicken keeping have we seen anything like this. I hope it doesn't mean someone is going to pass away soon. We do have a few hens that are now about 7 years old, but the rest are under 2 years. Any thoughts on this would be greatly appreciated as I am clueless at this time. Everyone seems to be eating fine and all came running to me this afternoon for a snack of green beans They are on their normal diet of lay crumbles, a little scratch for a treat and they have oyster shell and black oil sun flower seeds available as well as lots of fresh water. This was really gross and I hope I never find another one again. I don't even know what to call it in order to google it.