Returning Home?

We received a letter from CYS stating that Mya will be removed from our home to return to her birth mom.  Mya has been a part of our family for almost two years (since she was 9 months old).  The visits with her mom have increased and she is now going on a few overnights each week.  Her behavior has changed.  She cries all the time and says, "Owe!"  but is not able to tell me where it hurts.  She goes to the corner and just stands there facing it for no apparent reason.  She is no longer the happy little carefree girl that we have known.  It breaks my heart as I see her going through this.  I won't speak as much to whether her returning to her mom will be safe for her or not (I hope it is) but more to the whole process.  From day one, though the goal was for Mya to return to parents, CYS has been trying to get the goal changed to adoption and the parent's rights terminated.  We were eventually chosen as the adoptive family and have been expecting this whole time to adopt Mya.  She is a part of our family...the only family she knows.  Now, after all this time and very suddenly, CYS has decided that they have no concerns with Mya returning to her birth mom.  She will be torn from her family to return to a home that, at best, is very unstable.  My heart is aching for her.  I can barely stand it when she is on her visits and she is crying for me over the phone.  How can anyone feel that this is the best thing for Mya?  I've found that over the past couple of months there has been absolutely no consideration by CYS for Mya's feelings.  The whole focus has been on accommodating the birth mom and rushing Mya back.  Right now I am trying to stay positive and help Mya with this transition the best I can.  I just want her to be okay...