Well suppose a person wanted those Dominique eggs, but wanted to wait a bit. Then maybe by accident, a few blrw eggs would jump in the box to keep them company? The last batch of blrw eggs I had didn't hatch for some reason. Maybe po roughness. I did hatch a Salmon Favorolle chick and a blue Wyandotte chick yesterday. I was so excited when the hens laid those eggs, I put them in the Bator right away! Doesn't take much to make some folks happy:-D
I think.. if say a person - such as myself.. but obviously not myself - had a full incubator and wanted to wait say.. a couple of weeks.. then I think.. said postal box could possibly contain a BLRW egg or two.. or maybe even three.. if that person also wanted some Dominique eggs.. I'm just thinking out loud.