I have placed some of my eggs in my bator and they are on a turner, you see Ducks do not do well in an Upright position, they need to be laying down. I have had zero success with them on the turner and I have tried a LOT of eggs. lol I haven't quite figured out why, the only conclusion I have come up with is when they get to a certain size they can't survive in an upright position, remember your not hatching a chicken, chickens can be upright.
So right now I am experimenting to see How long they can survive on a turner in the upright position so far all doing very well, I plan on taken them off the turner Four Days before the due date. IF they make it that long and lay them down on the bottom of my bator. If they dont' make it, we will try again but cut the days down, I will try taken them off 7 days before hatching day. I will find what day is to late as far as having them in this position.
If they are already developing, you can lay them down, as they grow that air cell will stop wobbling.. I'm kind of surprise that on day 12 they haven't stuck yet though. But as they get bigger it should Stick, it won't really have a choice once that baby gets big enough and puts pressure on that air cell.. What kind of ducks are they? perhaps you can keep them in that position up to Four days before hatching day. They will need to be laid down at some point.
They make turners specifically for ducks as well as for a geese and sure enough the eggs are laying down, not in an upright position. Sounds like your eggs had a rough ride getting to you..
What I mean by upright is the large end standing straight up. Just like you have them in the egg carton, that is if you have the larger end up. LOL
