Chick partially unzipped, stopped, and pushed her head out. Help!

[zach_arneth]

Hey all,

I've read plenty of articles about when to assist and all of that, but I'm worried she is stuck, because she only unzipped about a quarter of the shell, has been trying to push out for 12 hours, and has most of her head outside of the shell. Should I interfere or wait? Here is a picture...

 

[Rammy]

How long had she been trying to get out? Some chicks take a while. If shes still chirping and breathing Id leave it alone.