It's generally not a good idea to leave baby chicks with mom. Chicks can get trampled or crushed by the larger birds, and they may not get enough to eat. It's also difficult to keep track of which chicks belong to which hen, making it hard to ensure that each chick is getting the care it needs. If you do decide to leave chicks with mom, be sure to closely monitor the situation to make sure the chicks are safe and healthy.