Hello TTLS
 
I join 
No-One and Daisy123  welcoming you here. Many parents with grands and children are in a similar situation to you, you are not alone   
As 
Daisy123 says many people find their way into treatment with our understanding and gentle support of loved ones. I learnt my daughter had to be ready to take on the most painful challenge, face her fears, herself, its been small steps. We also have parents here who have learnt the skills and lessons, based DBT  

 and are making equivalent progress with their child, who is not in treatment. 
TTLS what behaviours is your daughter expressing?
Is a good place to start.  
WDx