help with knowing if an egg is good dueing incubation
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All we have is brown and green eggs...
We only candle on day 18 and with a good LED flashlight, in the (mostly) dark, there is a stark difference between eggs you'd hatch vs. discard. Early quiters or non-fertiles are almost translucent compared to anything that has, or had, life in it.
If it's dark, it goes into the hatcher. If there's any hint of smell, the offending egg will be located and tossed. Never had one to date but I typically check for cracks or porosity before anything goes into the incubator anyways.
Other people do it differently, but we try to handle the eggs as minimally as possible. If it's going to hatch, it's going to hatch. Not much in between if temp and humidity are followed correctly.
Just my opinion, others will vary. Pick what works for you and stay with it.
- Innocent Bystander
The float test won't tell you much. If the egg wiggles in the water, the chick is alive. If it doesn't wiggle, the chick still may be alive.
Azjustin gave you some good advice - I'd just leave them all in unless you smell something bad. The eggs should be mostly dark inside by now, and I'm guessing the ones with the growing air cells are still on track. If the egg is mostly clear, it's a quitter. Use a good flashlight in a dark room and candle from the air cell down into the egg. Also check the pointy end, and see how much clear space is there, If it's a lot, the egg has probably quit.
Good luck with your hatch!