Candling eggs question

[sunnie7]

This is my first guinea hatch and only my second hatch period. Today is day 7 so I decided to just peak at 4 to see what’s going on. I plan to check them all at day 10 and mark ones that are ?able and toss them later if things aren’t progressing. 3/4 I could definitely see good veins forming and everything looked normal...

However this one I didn’t see any veins but there was an air cell. Are there air cells in infertile ones? I’m not tossing yet but just wanted to see what you all thought?!

 

[R2elk]

This is my first guinea hatch and only my second hatch period. Today is day 7 so I decided to just peak at 4 to see what’s going on. I plan to check them all at day 10 and mark ones that are ?able and toss them later if things aren’t progressing. 3/4 I could definitely see good veins forming and everything looked normal...
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However this one I didn’t see any veins but there was an air cell. Are there air cells in infertile ones? I’m not tossing yet but just wanted to see what you all thought?!
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Guinea eggs are harder to see into than light colored chicken eggs. They also take 26 to 28 days to hatch. This means that they take longer to develop than do chicken eggs.

If it was me, I would get a stronger light and I would not bother to candle until day 14. Ten days is nearly half way through incubation for chicken eggs. Fourteen days is halfway through for guinea eggs.

Don't get in too big of a hurry about discarding eggs. I don't even candle my guinea eggs until lockdown which is day 25 for me.

 

[Mixed flock enthusiast]

I live candling so I candle guinea eggs before lockdown, but I really can’t see much before about day 14. If you are used to chicken eggs, the early developing guinea embryo looks very odd to me, like a piece of dark floating chunk. I’ve opened a few of those that failed to develop, and it’s just a regular, chick looking embryo so I think that the weird look of early embryos is just a trick of the thick and sometimes reticulated shell. As the embryos progress, you start to see the expected large dark shape filling the egg plus movement. Agree with R2Elk that you are pretty early yet, and may want to wait a bit before making any judgement calls. I incubated a failed nest last year with 55 eggs coated in filth and gunk, and about 1/3 of those confirmed developing eggs failed to hatch. Even then, I didn’t have one explode or smell like sulfur, so am guessing that guinea eggs are unlikely to explode in an incubator. Therefore, I’d err on the side of caution and keep them until you’re sure. Here are a few candling pics of guinea eggs, Day 17 and Day 25, hatched two days later.