Having a brooder ready is always a good idea, just in case. If you know you have a hen who's been aggressive towards the broody's chicks, you can fence the broody off for the first few days, until the chicks get steady on their feet and able to run away. I've done that before. I bent a sheet of chicken wire around her area (maybe 3'x3' or thereabouts) so the other hens couldn't get to her nest, and I put food and water in there, next to her nest. She'll want to keep them in the nest for the first 2-3 days. When she starts taking them out, you can remove the barrier. Once they are scurrying about, they can run away from the aunties. Also, the broody will have bonded with them better and her instincts will kick in, and she should protect them. I've noticed that the level of protectiveness is not the same when the hen is in the nest on eggs/chicks, vs. once she leaves the nest and is protecting mobile chicks. I've had hens of different breeds let anybody come into their nest, sit on top of their head and lay eggs there (when I've seen other people's hens turn dinosaur and attack anything that comes into the nest). But once they take their chicks out, they whoop butt and turn all mama bear on the flock.
if that’s the case though I think it would be better if I took it and moved it in with the others
