Do I have to have my Grand child go to a appointment with DCFS

I have my Grand child living with me. Department of Child services removed my grand child from the mother's home do to physical abuse by the mother .DCFS has since placed my Grand child in my care ..I received a copy of the court case that initially began over a year ago .At the time of my grand child's abuse .Department of Child services had. not provided medical attention for the child in question immediately after the physical abuse to her face and head . .As a lot of time has gone by .I was not aware CPS had not done so I recently had taken the child to see a Physician M.D. The MD stated that if any damage was done it is to late now The MD examined the child and stated if there was any damages done. the injuries would be healed now CPS now wants to have the child. seen . by a what they said is a neurologist .Come to find. out they are having the child tested for memory loss and motor skills . My question is does CPS. have authority to make us attend these appointments .