Duckling Alive But Not Pipping, Failed Float Test, And Half The Size of Shell?

[CourtCalee]

My Pekin has been "laying" with our Mallard duck resulting in a bunch of eggs so I figured I would try incubating them and see what happens. 3 out of 5 are doing great but were on day 30 now and no pipping. I just float tested and candled the other 2 in question, one is bad the other however I NEED HELP! It doesnt fill up the shell like I'm used to seeing, I see what I think is a blood ring, but it is without a doubt still alive, and it failed it's float test. I can see it moving, no pip internal or external though. Any help or recommendations greatly appreciated!

 

[Isaac 0]

How did your hatch go?