Can anyone tell me what’s up with this egg?

[MeeMawsChicks]

I found this egg yesterday evening and now another that is all “wrinkled” this evening. I threw it away before I thought to take a picture of it. It actually looked like one of those wrinkled Chinese dogs.
They are from two different chickens. I recently bought a different brand of feed for them from Walmart. I have gotten feed from there in the past so I know they have good brands but this is one I have never gotten before. I hope that this is just a fluke and won’t keep happening. I do have a leghorn that lays some eggs with extra calcium deposits on the shell but that doesn’t bother the taste of the egg. These other ones, I threw away though. I wonder if these issues are caused by the amount of calcium in the feed.(?)

 

[RubelliteRose]

Here is a great article on egg issues: https://www.backyardchickens.com/articles/common-egg-quality-problems.65923/

That looks like a slab sided egg to me:

11. Slab sided or flat-sided egg​

When two eggs enter the shell gland pouch shortly after another, normal calcification is interrupted. The second egg will not be as complete as the first and may be flattened at the side where the eggs made contact, resulting in a flat or slab side. Causes are:

- Disease, such as infectious bronchitis;
- Stress, frights, and disturbances;
- Overcrowding in coop/run;
- Sudden large increase in daily light hours, for example, when supplementing light during winter months.

Perhaps something stressed out your flock. An overnight predator visit? Hopefully your eggs will return to normal tomorrow

 

[MeeMawsChicks]

Here is a great article on egg issues: https://www.backyardchickens.com/articles/common-egg-quality-problems.65923/

That looks like a slab sided egg to me:

11. Slab sided or flat-sided egg​

When two eggs enter the shell gland pouch shortly after another, normal calcification is interrupted. The second egg will not be as complete as the first and may be flattened at the side where the eggs made contact, resulting in a flat or slab side. Causes are:

- Disease, such as infectious bronchitis;
- Stress, frights, and disturbances;
- Overcrowding in coop/run;
- Sudden large increase in daily light hours, for example, when supplementing light during winter months.

Perhaps something stressed out your flock. An overnight predator visit? Hopefully your eggs will return to normal tomorrow

Ohhh! We have been having issues with raccoons lately! The little buggers can’t get in the coop but they were digging around the fence and made a racket the other night. They even knocked over a bucket and other things. I bet that upset the chickens.
Thanks for the information and quick response