Our momma hen was ready to go back to the flock. And her babies were outgrowing their galvanized water trough. The problem with letting the chicks be with the big girls is the different feeds they require. The hens love chick starter-grower and they tend to eat it up!
That's why we made a chick creep feeder.
The babies can come and go through the small openings at the bottom allowing them to eat all they want without competition. It may not be fancy, but it works!