EE mix

[BantamLover21]

They look like classic hatchery EE. If that's the case, likely nothing was mixed with them. They've been bred as EE for generations, likely decades depending on the hatchery. Personally, I think Leghorn blood may have been infused from time to time to boost production, but I have no proof of that. I don't see any point to infusing brown egger breeds, though, as that would cause them to lose egg color for a generation or so. But who knows what the hatcheries do?

If your hens lay blue eggs, they're "pure" for the blue egg gene. If they lay green, they have one blue and one brown gene. that's a good way to tell.

Agreed