In In re Fred J. (1979) 89 Cal. App. 3d 168, county social services filed a supplemental petition seeking to remove children from the care of their mother. There, the juvenile court conducted a jurisdictional hearing, then moved without explanation directly to disposition, without a discrete dispositional hearing. The court of appeal reversed, finding a violation of the applicable procedural requirements. (In re Fred J., supra, 89 Cal. App. 3d at p. 178.)