@KARy408 Yeah that was the biggest egg so far, just in time for the post, but Snow's new to eggs and is laying about half double yolkers right now, mostly around 100g (3.5oz) - 120g (4.2oz) but yesterday she squeezed an extra 20 grams in (haven't opened it yet maybe it is a triple yolk - never seen one but I've heard they exist). Her "normal" one yolk eggs are 85g(3oz)-95g(3.4oz) so they still are noticeably larger than a Jumbo (BTW if anyone knows of a good source for cartons that will hold these monsters, please let me know. I ordered some jumbo cartons, but I can't close them.) She's got to be over 9 pounds now - the last time I weighed her she was 8-1/2 lbs and she hadn't started laying yet.
None of the eggs from other ducks have been doubles so far so I don't think it is the food unless she is the best forager and is over-boosting her protein on grasshoppers, but i doubt a Pekin can out-forage a runner (certainly not this Pekin - she mostly waddles around muttering to herself) so I think she eats mainly food, romaine and peas for treats. All but two of my laying ducks were hatched in March of this year so I get lots of funny shapes and sizes right now. I got one that was 28g (just under an ounce) with no yolk and it was perfectly round. I also found one in the yard about the size of a big grape - too big to be a robin's egg - light green with no speckling - but I don't know if that came from one of the ducks or was dropped out of a tree somewhere (the nearest tree was over 30 ft away).