I tried this last year with great success. I had one go broody, so I got fertilized eggs and moved her. She stayed a week, and then we were gone and she left the nest, but went back to her original nest and was as tight as a tick on 4 egg shaped rocks.
So on about day 21, I brought home some baby chicks. At dark, it was raining and a bit chilly, I slipped down to the hen house. I was a bit leary about getting the chicks under her, cause she would give you a smart peck if you tried to shift her. So I thought I would put each chick (who were bright yellow) on top of her back, and then get brave and lift the hen up, so that hopefully the chicks would get under her.
Never had to, I slipped the first one, on her back, kind of behind the wing, and there was a little movement in the almost dark, and he disappeared. Apparently there is a lot of empty space under a hen. As soon as she felt them moving her cluck changed, and I really thought she would be hoarse by morning.
Now the nesting box was about 2 1/2 feet from the ground, and I was a bit worried about the other hens, and how she was going to get them down. but when I got there in the morning, she had them out in the run, and they were so cute. It was pretty cold out to, and she would call a time out, and every chick would come running, and get a little snuggle warm up time. That night she went in and built a nest on the ground for them.
But when they were only a few weeks old, she would roost on top of the nexting boxes, and she got those chicks up with her every night. I am so praying that one of those chicks will go broody now! But so far nothing. It is the easiest way to raise chicks!
MK