Nothing cuter than a momma hen and chicks!! But, nothing more shocking as when a hen attacks a little chick!
all above is true, need a broody. We’ve had a 2.5 week broody successfully adopt chicks (at night, in the dark they were slipped under her). But we have also tried to get a broody that was only broody for maybe 2 weeks to adopt, and it was a quick rescue of the chicks being attacked. So, they need to sit for nearly that 3 week period before they are ready to hatch/adopt. And even then, so girls are not good mommas.
good luck in the future, and enjoy these chicks!