INB4 - Rule 5! It’s not a calcium deficiency. This is an egg from an older bird with insufficient albumen to support the shell during its formation. There are a number of things that can cause this including dehydration, illness, and the number one cause, old age. This is a perfectly good shell, it’s just wrinkled.
Found like this last week. First one ever seen, and so far no more.
Are your chickens getting old? Sometimes it happens because they’re sick or stressed. Other times it’s just old chickens. Unless it starts happening regularly it’s normally nothing to worry about.
This flock is under 2 years old. Could have been stress, maybe heat? It has been crazy hot for 2 weeks, triple digits. They have lots of shade and water. Plus I till up the dirt in their run often.
Yes. Weird eggs often happen in young birds and old birds but there are other causes. Heat stress can cause this as can other stresses. If it’s just one egg just once it’s probably nothing to worry about. Make sure they have clean, fresh water and food and keep an eye on your eggs. If it starts to be a regular thing you may need to dig deeper.