I’d leave the rooster with them. It’s doubtful he will hurt themThanks for the responses guys, seems like the most natural order of things is to leave the chicks with Mom, put some starter food in with them, separate the rooster just in case...and help the chicks find water, despite mom's objections...once they've started leaving the nest anyway. Once mom has decided they've all had a chance to hatch.
And if he tries the mother will rip him a new one
Just give food and water and leave them all together in my opinion