i believe it's hatching delay, i experienced the same and eggs took 25 days to hatch, i was about to break some but i waited until i heard chicks voices.
Hi all
My name Hezam, It's nice to join you
i'm from Yemen and i live in Saudi Arabia...i'm 28 years old male.
Raising chicks is one of my hobbies, i have hatched many chicks but i've never used incubator !
So i'm preparing a small business project which is hatching/raising Brahma chicks...