can someone tell me why my hen sets half the day,then gets off

[mark-hiett44]

My hen isn't setting full time.what's up with her?

 

[sheaviance1]

I have one that does that too, but she takes absolutely forever to lay her egg. The one broody hen I have (I'm trying to break her) never leaves the nest. I had another one that seemed to be "trying on broody for size" who would sit in the nest most of the day, and then give it up. It's almost like she wasn't sure she wanted to do that or not.