If they've just started laying, they're not broody yet. The silkies will go broody often though, so you can always pull out whatever's under them and put some duck eggs there instead--they'll hatch whatever's under them. Needs to all be the same species though (otherwise you have different hatch times, and some will be abandoned in the nest), and all put under at the same time (same reason).
Good luck!
Good luck!
