I have had problems with my chicks failing to hatch.
They see to be fully developed but fail to break the air sac. fail to pip or fail to get out of the shell.
The ones that I help out of the shell seem to have one or both feet that turn under.
What advice can you give me.
Next time you encounter this please open the egg and post pics, Im particularly concerned with the way the back of the neck/head area looks.
Gerald Barker