My goose (21 weeks) is definitely the one laying the mystery eggs as you can see in the pictures. They are no bigger than the ducks eggs and since this is the first time I actually saw her do it I am not sure over the past 2 weeks which ones she laid and witch ones the duck laid. I know for sure the Duck eggs are the ones I found by the pond. Then I started finding egg in a hole one of them dug. Now I find some near the pond, some in the hold and some in the crate. But atleast now I know for sure that both my duck and my one goose is laying. But I can say now without a doubt that the duck is only laying one egg a day.