Don't tell them, they'll not be able to tell the difference. Many chicken people don't know how to tell, and have to look REALLY close to try. It is impossible to do by taste. With that said, yes, some people refuse to eat fertile eggs. Some people refuse to eat farm raised eggs (they want them pasteurized to kill the germs
) or they are afraid that they will open the egg and find a chick. I take it on myself to educate people about the absurdity of these concerns.
