Our ducks started laying roughly a month ago. When we were feeding the ducks the 16% layer feed, we were getting 3 eggs a day (one from each duck) but since we started feeding the 18% pellets, we have only gotten 1 a day since. Is the 18% too much protein for laying eggs? (Feeding Buckeye 18% layer/breeder pellets.) And are the yolks collecting in the ducks like they do in the chickens before it kills them?