The Broody Hen Rules

[Jay-Mar28]

I have a decent size pen with 2 muscovy drakes and 9 hens. The hens have started to lay clutches in the nesting area but i am wondering if there are any rules as to separate the hens once they begin incubating. Do i leave everything as it is and the other muscovies wont injure her or the ducklings once they hatch? What precautions should i be taking or watching for?