Making dinner tonight at my folks house, i grabbed 4 eggs, my duck eggs I give them, and one of them had a nasty green spot on the yolk about the size of a kidney bean. Of course my mother had to be looking, she probably wont ever use one again. In any event i tossed those 4 and cracked 4 fresh which all seemed fine. Research shows they are meat spots and probably started as blood spots? Read some threads here and elsewhere that seem up in the air about what to do, i dont sell my eggs, still dont care to have gross stuff oozing out of the eggs, and more importantly, what does it mean for my birds? Just an anomaly? One getting sick? Any input would be appreciated.