How long do I wait?

[wvchickenhouse]

How long do I wait for my eggs to hatch in my incubator if it's past 21 days? Mine should be pipping but they are not....Help please...

 

[Ukiah]

Wait until day 26-27 atleast.

Have you had any problems with temperatures? Low temperatures slow development and cause late
hatches. Last year the thermometer in my incubator was reading PERFECT at 99.5 F - 100 F, but it
turned out the temperature was only 94 F, and my only baby who hatched pipped on day 26.

I would wait until the 23rd day or so to do this, but float testing the eggs is a good way to check viability.
Also, what are you seeing when you candle the eggs? Do they look under developed at all? Do they look
as if they have pipped? (Shadows/beak will be visible in the air sac when candling if so)

Float test