I've been trying to hatch eggs from my flock of Silkie ducks for a few month now. I only have two ducks laying right now, but I put all their eggs in the incubator. About eighty percent of them are fertile and develop fine until they just die around day 28... I have no problems hatching chicken eggs, I think the duck eggs' air cells are fine and the right size when they are supposed to hatch, but nothing ever hatches!!! Am I missing something? I'd really like some more Silkie ducks... Does anybody have an idea what I might be doing wrong? I have an Brinsea Octagon incubator and my chicken eggs hatch right on day 21 with no problems whatsoever... I have been reading on the forums about ducklings taking longer to hatch, so I already leave the eggs in the hatcher until day 35.... Thanks for any advise you could give!