Another possible source of fertile commercial eggs are the breeding flocks. I'm not necessarily talking so much about the hatcheries we use but the hatcheries that provide hatching eggs for commercial layers and maybe even meat birds. They are all going to have excess eggs. I think the...
I have no idea if those eggs are hatchable. Many people that sell eggs don't go to the extra expense to keep roosters with their flock and the eggs may not have been stored and handled in a way that they can be hatched. Nothing wrong with trying but I'd not get my hopes up.
Here's hoping...