If she is in a group situation, it would probably have to be tightly monitored, like a well run DBT, from what I have heard. Adolescents can be easily triggered by each other and I think that it might be worth asking about either the type ofgroup I mentioned (such as one that follows a strict program or has a very keen moderator to handle overloading on the negative) or individual therapy. Best would be a mixture, but i am a ware that this might not be available for you. Good luck, and HUUGGGSSS to you and your daughter.