What in the world is this?

[Audry]

Well, based on the suggestions that it's a bunch of undeveloped eggs or part of her reproductive system I was able to find a few other threads dealing with the same thing. Apparently it's unlikely to have done any lasting damage, so I'll stop worrying. Thanks for the help!

 

[Xenia's Chickens]

Looks like "mummified" retained eggs. I would check the hen for a prolapsed oviduct. It must have taken a lot of straining to pass that thing!

 

[Audry]

She's still doing the weird twitchy thing and making a soft moaning sound each time she does it, but she's settled in and nobody's bothering her so I think I'll just keep an eye on her. They tend to spaz out a little when they go in the cage and I don't want to upset her if she's comfortable in the coop.

 

[Audry]

Xenia's Chickens :

Looks like "mummified" retained eggs. I would check the hen for a prolapsed oviduct. It must have taken a lot of straining to pass that thing!

Would that be fairly obvious externally? There's not really anything for scale in the photo, but this is smaller than a regular egg.​

 

[dawg53]

It's probably "lash." Here's a link with some pics: Post #12
https://www.backyardchickens.com/forum/viewtopic.php?id=316566&p=2