I feel useless in a child situation? Help?

Hello, I just feel a bit upset because my best friend has twin foster siblings (both around 15 months old) lets call them Jane and John. Now they are in foster care because of neglect from theyre parents (never let them out of theyre car seat, never changed theyre diapers, etc.) Now the twins have been with my friend's family since they were 9 months old. At 9 months old they could hardly sit up on theyre own because of the neglect from their parents. Now at 15 months old they are walking and even starting to run! John; allergic to milk, heart murmor, iron deficiency, has series medical issues. Well, now the judge has decided to give the twins back to their biological parents. So on one 3 day visit to their parents, John came back with blister, skin bubling, burns from sitting in his own urine. AKA they never changed his diaper for the 3 days. The parents disregard the fact John is allergic to milk and feed him milk. By the way, their biological mother has had 2 other sons she gave up custody to her parents just a year or two back. The mother has said on many occasions "I finally have my little princess." Oddly enough, Jane comes back perfectly fine. DSS knows all about John's burns and yet they are still schedualed to go back in less than a month….I am severly upset about this. But Im only 14, what can I do? Help?