THE SMART TRICK OF FERTILE EGGS THAT NOBODY IS DISCUSSING

I am no professional on swans. I fairly feel that a night-time predator filched the eggs. I've heard people declare that their birds( chickens, geese, whichever) remove infertile or nonviable eggs from how many eggs do swans lay their nest. In 40 several years I haven't had a chicken get rid of their very own egg/s within the nest besides accidenta