This was a strange egg like thing which was leathery on the outside and putrid membranous stuff inside. WT...? Laid by a two year old who hasn't laid since the introduction of some new hens and she moulted at the end of Autumn (Australia). Photos of the monstrosity are in the gallery. Not sure how to post it here.
That looks to me kile she has been egg bound, and her body has attempted to reabsorb or contain the "problem, which now looks like she has passed it. Keep an eye on her and make sure if she lays again that it's approaching normal. The next few eggs may be small or deformed. If she doesn't lay check she's not become egg bound again.
At two years old your hen is coming to the end of her prime laying cycle. As long as she is eating well and acting normally, she should be fine. However this could be the beginning of an internal laying issue and she may stop laying eggs. Hens bred for high egg production are known to have such problems as they are strictly bred for producing lots of eggs in a short period of time. Unfortunately, nature did not design chickens to be egg producing machine, and as a result the egg factory breaks down with time and strange things happen. Funky eggs happens more often than we are aware but the deformed egg is usually eaten before it is found. Keep your hen on a top quality diet with lots of variety. She may not be your best laying hen but she can live a normal life for a while. Good luck with her!
Hello there and welcome to BYC! Yes, sounds like she laid a "lash egg". She has shed part of her reproductive lining. This generally happens to a bird that is winding down on the laying, however I have a 3 1/2 year old hen that has laid several of these and is still laying strong. Your girl may getting close to the end of her laying cycle or may continue on. Time will tell. Make yourself at home here and if you have any other questions, feel free to ask. Welcome to our flock!
Welcome to BYC! Please make yourself at home and we are here to help. Here's a great link to check out. https://www.backyardchickens.com/a/common-egg-quality-problems