Some people never see double yolk eggs. I saw quite a few when I had many young layers. Normally they stop laying those after a while. A few can lay them all their laying years. But an oversized egg can damage the cloaca, and if they have a shell-less egg, those can be difficult to pass. Also thin shelled eggs can break inside, and that can make them feel bad and cause a setup for infection. Sometimes we may see a dropping that contains egg contents or a membrane. I would watch to see that she is eating normally and not separating herself.
Edited to say, that coccidiosis is more common in warm weather, but there are cases of coccidiosis reported every day here. It doesn’t hurt to get a fecal test run, and to also look for other parasites.
Edited to say, that coccidiosis is more common in warm weather, but there are cases of coccidiosis reported every day here. It doesn’t hurt to get a fecal test run, and to also look for other parasites.