211.455.  Procedure after filing of petition — determination of service — extension of time for service, when — investigation. — 1.  Within thirty days after the filing of the petition, the juvenile officer shall meet with the court in order to determine that all parties have been served with summons and to request that the court order the investigation and social study.

  2.  If, at that time, all parties required to be served with summons have not been served, the court, in its discretion, may extend the time for service if the court finds that service may be forthcoming and that the best interests of the child would be served thereby.

  3.  The court shall order an investigation and social study except in cases filed under section 211.444.  The investigation and social study shall be made by the juvenile officer, the state children's division or a public or private agency authorized or licensed to care for children or any other competent person, as directed by the court, and a written report shall be made to the court to aid the court in determining whether the termination is in the best interests of the child.  It shall include such matters as the parental background, the fitness and capacity of the parent to discharge parental responsibilities, the child's home, present adjustment, physical, emotional and mental condition, and such other facts as are pertinent to the determination.  Parties and attorneys or guardians ad litem or volunteer advocates representing them before the court shall have access to the written report.  All ordered evaluations and reports shall be made available to the parties and attorneys or guardians ad litem or volunteer advocates representing them before the court at least fifteen days prior to any dispositional hearing.