Missouri kids in foster care are far too likely to be doped up with too many prescription drugs, at too young an age and with too little information given to foster parents.Those are the explosive allegations in a lengthy new, first of its kind class-action lawsuit filed in federal court this morning by the Saint Louis University Legal Clinic, Children's Rights Inc. and the National Center for Youth Law. The law groups filed the suit on behalf of children who are in or will be placed in the foster care system in Missouri.…