Split parenting occurs when it's in one child's best interests to have a different overnight arrangement than their siblings. (For example, an infant who is still breastfeeding would need to stay overnight with the mother while the other children go with the father. Or, one child's academic responsibilities require them to be overnight with one parent more than the other.) Split physical care does not necessarily mean that a parent has sole physical care of one child and physical care of the other child is shared. It just means that the overnight schedule is divided differently.