Some hens communal brood with harmony; some not so much...all depends on the hens and the environment. To close of quarters and not enough feeders can cause squabbles between hens with chicks getting tromped upon. Some hens covet others chicks and are chick stealers. Some hens are bad mothers and leave their chicks with the neighbors. It all depends.Oh no! It sounds like I'm going to have my hands full! How do I know who's chicks are whose since the first hen went broody on the 20th and 2 others on the 25th and the last one on the 26th. Or would it be better to just seperate everyone now if I can?
I keep my broodies separate as they tend to compete and shove each other off the nests when they brood (leaving eggs cold); and moms tend to squabble with each other (but never attack chicks)...so I separate them at first but let them have a free run area together that is large enough so everyone can find their own corner. In time they integrate pretty well.
Assess your hens and flock and conditions, set up a plan A and have a plan B and C in line in case things don't go well.
Lady of McCamley