They come off the nest once a day to eat, drink and leave one of those near baseball sized poops. Broody poop is hard to miss but easily avoided when stepping.
Chicks skydive from much higher than 1 foot. I was shocked when the first hen reared brood all jumped down from 3 ft to get into the...
Just get them each a nest and split up the eggs between them. If you really want to break a broody know that it will take a week or much longer depending how long they've been brooding. It's a darned if you do dang if you don't thing. If brooding for a week then will be another 2 to 3 weeks...