Is Float Test Reliable for Testing Viability of Duck Eggs?

Zip

Chirping
Aug 6, 2009
52
4
96
Ontario, Canada
Hi everyone,
In an earlier post I explained that I rescued 3 eggs from one of my ducks that left them behind when moving nests. 1 of the eggs has since hatched and the other perished (the egg had been damaged when I found it) and the last egg is still sitting in my incubator. For those who haven't read my first post It is worth mentioning that I have 2 ducks that started setting about a week apart from each other, but the day of the first ducks hatch date the two ducks decided to combine their nests into one, so I am not exactly sure how old the egg I have is, but both mommas have finished hatching out babies so I am sure this guy should have hatched by now, or at least soon.

Today I was getting ready to give up and toss the egg when I saw a sticky on here about the float test. I tried floating the egg and it immediately sunk. According to this sticky this should mean that the egg was never fertile to begin with... this doesn't make sense because upon candling there is an almost completely develped ducking inside with just a few tiny veins left visible towards just outside of the air cell.

So, does this mean the float test is useless for testing duck eggs? or is something else going on here?
 

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