They have to give you notice of this hearing. You have a right to be there. Here is the law:
CHILD PROTECTIVE ACT
16-1615. SHELTER CARE HEARING. (1) Notwithstanding any other provision of this chapter, when a child is taken into shelter care pursuant to section 16-1608 or 16-1611, Idaho Code, a hearing to determine whether the child should be released shall be held according to the provisions of this section.
(2) Each of the parents or custodian from whom the child was removed shall be given notice of the shelter care hearing. Such notice shall include the time, place, and purpose of the hearing; and, that such person is entitled to be represented by legal counsel. Notice as required by this subsection shall be given at least twenty-four (24) hours before the shelter care hearing.
(3) Notice of the shelter care hearing shall be given to the parents or custodian from whom the child was removed by personal service and the return of service shall be filed with the court and to any person having joint legal or physical custody of the subject child. Provided, however, that such service need not be made where the undelivered notice is returned to the court along with an affidavit stating that such parents or custodian could not be located or were out of the state.
(4) The shelter care hearing may be continued for a reasonable time upon request by the parent, custodian or counsel for the child.
(5) If, upon the completion of the shelter care hearing, it is shown that:
(a) A petition has been filed; and
(b) There is reasonable cause to believe the child comes within the jurisdiction of the court under this chapter and either:
(i) The department made reasonable efforts to eliminate the need for shelter care but the efforts were unsuccessful; or
(ii) The department made reasonable efforts to eliminate the need for shelter care but was not able to safely provide preventive services; and
(c) The child could not be placed in the temporary sole custody of a parent having joint legal or physical custody; and
(d) It is contrary to the welfare of the child to remain in the home; and
(e) It is in the best interests of the child to remain in temporary shelter care pending the conclusion of the adjudicatory hearing; or
(f) There is reasonable cause to believe that the child comes within the jurisdiction of the court under this chapter, but a reasonable effort to prevent placement of the child outside the home could be affected by a protective order safeguarding the child's welfare and maintaining the child in his present surroundings;
the court shall issue, within twenty-four (24) hours of such hearing, an order of temporary legal custody and/or a protective order. Any evidence may be considered by the court which is of the type which reasonable people may rely upon.
(6) Upon ordering shelter care pursuant to subsection (5) of this section, the court shall also order an adjudicatory hearing to be held as soon as possible, but in no event later than thirty (30) days from the date the petition was filed.
(7) If the court does not find that the child should remain in shelter care under subsection (5) of this section, the child shall be released and the court may dismiss the petition.