That's a creative idea! (I couldn't have done it - no leaf or snow or hair blower.)
Was going to put the girls back out today....and the fog has rolled in. I can't even see the pasture the girls would be in.
Maybe this afternoon they can go back out. I have a temporary block against most of the entry points. A creative (and most of my chickens are creative and smart) can figure out a way over it. It's a temporary solution until I can get a more permanent one.
And apparently some of the other girls in the same flock heard that if you huddle under the coop, then you can get to come into the warm house.

I put them back in the coop. They couldn't get to the small section the babies were in.
I check under the coop every day now...er, every night? I check it daily.

I love my animals. Thank goodness that the babies are doing well. Lesson learned.