Fertilized Eggs

[Preservation Acres]

Can you tell if a freshly laid egg has been fertilized just by cracking it open? How soon before the "spot" appears inside an egg?

If I pick up eggs 2X a day, will the "spot" still be there?

 

[gritsar]

At the top of this category there's a sticky authored by Speckled Hen that shows pics of the difference:

https://www.backyardchickens.com/forum/viewtopic.php?id=16008