THE BEST SIDE OF FERTILE SWAN EGGS FOR SALE

I am no specialist on swans. I somewhat are convinced a night-time predator filched the eggs. I've listened to folks mention that their birds( chickens, geese, what ever) take out infertile or nonviable eggs from their nest. In forty yrs I have not had a chicken take away their very own egg/s through the nest in addition to accidentally. Hahira, G