Thanks for the info! Initially, the link to the article didn't work, but this evening it did and was very informative. So far, none are acting listless. I'll also watch for the other symptoms.
I cut it open and it had what looked like pieces of chicken and slime. I guess it was a lash egg, but all the girls seem healthy. Thanks for your reply.
Is this a "lash" egg? I found it yesterday. Although my hens have 6 laying boxes, they all lay in the same box. How do I know which hen layed it? Thanks!