First Hatch - "HELP"

[nicschicks2]

I brought some fertile Cayuga eggs to see if I could hatch them in an incubator, three have hatched on time and a doing well but there are two that have still not hatched they are three days late how long should I wait?

 

[Farmer Viola]

Quote:
see: https://www.backyardchickens.com/a/step-by-step-guide-to-assisted-hatching

there is information about a float test which I think would be appropriate after 3 days..