I sell eggs as eating eggs NOT hatching. When I'm asked for hatching eggs I treat them very different. Lastnight I came home to a NASTY message on my phone from a long time customer about the extremely low fertility of my eggs. She apparently invested in a fancy brand new bator and without telling me put 2 dozen eggs from me into the bator. After the 6th one went bad and exploded she stripped the bator and threw them away. Then left me the nasty message. I didn't get to talk to her but I did talk to her daughter. Turns out almost all the eggs she put in the bator were duck eggs. At that point I was trying not to laugh as I explained to the daughter I don't have a male duck, all I have is hens. She was very confused and said she'd seen a my roosters. Roosters, I informed her, are chickens, not ducks, they cannot make baby chuckens or dickens. I could almost hear the moment of revelation as it sunk in. Thnafully she laughed, though I doubt her mama will. To be nice I told her how to disinfect the bator and when she was ready to try again to let me know and I'd get her eggs meant for hatching.