Finally panic inducing news:
This is the first time I have put chicks under a broody. I selected three chicks and carefully placed them under a broody hen. The hen startled a little when I opened up her brooder box, but settled quickly. She was contentedly sitting on three sleeping chicks when I left them. Now I am in panic mode hoping she will fully except them as hers.
Now if you don't mind I am going to go curl up in a fetal position and fear for the lives of three tiny little chicks. And never do anything so crazy again. Next time, if she wants to be a mama so bad she will just have to hatch her own chicks.