Judgment denying a petition for writ of mandate to compel defendants to pay for minor's physical therapy, including hippotherapy to treat her cerebral palsy and arthrogryposis, is affirmed, where: 1) hippothereapy is not covered by California Children's Services (CCS); 2) hippotherapy is not a medically necessary treatment as the benefit provided by hippotherapy can be obtained from other treatments received in a gym; and 3) the services provided by the private companies selected by Mother do not meet the criteria for vendor services and required services can be provided by CCS.