I have a blue swede and a black swede about 22 weeks old. The blue started laying just over a week ago. I have gotten one egg per day from her since then. They have all been nice hard shells and good shapes. This morning I went out to find four eggs in her nest. I researched and found that ducks sometimes will lay two in a day, but not more than that. Then around 2, I was out in the yard with them having lunch and she laid another egg right there in the yard. This egg was very soft. I feed them layer crumble and they get tomatoes and grapes for treats along with whatever they dig up in the yard. Is something wrong with my duck? Five eggs in one day? And only one soft. They are kept in a wire kennel at night so no other birds could be adding to the collection.