Was it
@KaleIAm or
@Daphne_loves_mealworms that was getting some odd eggs from their ducks? I believe they were a darker green than usual but of course I may be wrong. I just wanted to share my odd find. I'm almost positive it was laid by my Pekin and hopefully all of her recent egg shell issues are related to her molting. She's been laying soft shelled, no shell, and this. It doesn't really look like a body check or slab sided, although those are the closest examples I've found. It looks like a shell gland issue, in my inexperienced opinion. She's laid several eggs with that rough wide oval area on the side of the egg but this one is very noticeably odd. Have you noticed any duck eggs like this before?
*overlook my dirty hand. I was cleaning/clearing outside.
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The egg looks so much more wierd in person. My daughter called it an alien egg