Let her set or throw in the incubator?

[Blondi]

I've had a barred rock bantam and a roo in an isolation pen (large breed dog kennel in my garage) for a few weeks now since they are new, she lays everyday to every other day, I haven't found eggs in the last four days, this morning she's sitting on three eggs! Guess she buried them in the pine shavings?
Anyway she has never set before she's very active, I have eggs due to go in the bator tonight I'm torn between throwing them in or seeing if she will set?

 

[Ozarkhomesteader]

If she is serious, she will set on them all day save an hourish to get food and water. if she is not i would put them on the incubator. It is fun to let them hatch their own though!