THE SMART TRICK OF FERTILE EGGS THAT NOBODY IS DISCUSSING

I'm no expert on swans. I rather are convinced a night-time predator filched the eggs. I've read men and women state that their birds( chickens, geese, whatever) eliminate infertile or nonviable eggs from their nest. In 40 decades I haven't experienced a fowl take out their own individual egg/s in the nest aside from unintentionally. A new & ferti