Is there a trick to hatching Jersey Giants?

[JAPJRGIRL21]

None of my JG eggs will hatch. They are fertile and I have other eggs in with them that hatch just fine. They just don't hatch. Do they require higher humidity or me to sing to them? Any and all suggestions are welcome. Thanks!

 

[pride&joy]

My JG seem to hatch just as well as my other breeds (Shamos, Assils, ect) but by all means there is lots I don’t know. Hopefully someone will have more experience will share with us. Bump

 

[Trophamus]

my jg's hatched fine, however they hatched a day or 2 later than all the others and almost went into day 24

 

[JAPJRGIRL21]

Hopefully someone can tell me the secret trick...I have kept them in the hatcher up to day 25...just so bummed because I have already lost a dozen of them - at different times.