Hi, I havebeen trying to hatch eggs from my runner ducks fo 2 years now. I have one duckling that will hatch around the 28th. This is the first fertile egg so far and I've set about 70 eggs between last year and this year.The other eggs I set with this one were also infertile. The hen layed them the 25th 26th 27th 28th and 29th of march. His egg was the one layed on the 28th, and they were all stored in the same place and turned twice a day untill I set them on the 1st of april. Last year I tried to hatch eggs in an incubator, under a broody hen, and I let the duck sit on some herself. This year I have tried to hatch some under a broody hen (the five layed in march are under her), and in an incubator that I bouht this year. None exept the one were fertile. Any ideas why this is happening?