Stress can do a number of funny things (to people as well as animals). Good for you on keeping a close eye on your flock. I'm glad the article helped, it's been a useful reference to me a number of times.
Have a good day!
Are your birds mature and had they been laying previous to the fairy eggs and wrinkled eggs? There's a really good article about common egg problems at this link that may be helpful to you:
https://www.backyardchickens.com/a/common-egg-quality-problems
It's not unusual for birds to have...