If you encourage the hens to lay eggs in their enclosure (instead of, say, behind the tool shed) and check for new-laid eggs every day, fertilized eggs may at the very most have a little blood spot in them. And if that’s too gross for you, you can feed em to the dog.
My Mom would always refuse to eat an egg with the dreaded blood drop in it... I was less picky and gobbled them down :-)
Pointing out that her steak was loaded with blood did not persuade her to eat the eggs..lol