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I found this about corrugated shells. Maybe it'll help you figure out what's going on.Came home at 5 today and had 9 eggs total, only hen that didnt give was my bantam and she gave me a egg the last 3 days. My americana gave me her green egg today after a 2 day break. The one wrinkly egg is back, all I can think when I get one is “ouch!” lol
2 today and they looked like this. Article you linked was perfectly timed. Thank you.I found this about corrugated shells. Maybe it'll help you figure out what's going on.
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https://backyardpoultry.iamcountrys...deficiency can cause these weird, wavy ridges.