So are you saying she started ballet and pointe at the same time? If so, this is a huge red flag that she is not receiving good instruction. Dancers need several years of intensive ballet before starting pointe. I'd also be concerned about whether her shoes fit, as they so often aren't fitted properly, resulting in feet, ankle, knee and back problems. I posted this on another thread:
I really like the forum Ballet Talk. Here is part of a sticky that is posted there. You'd have to join to read it all, but it's a great site with a wealth of information.
When she gets to pointe, make sure she has her shoes fit by someone who really knows what they are doing. If it takes 5 minutes, they don't know what they are doing. Here are a couple articles.
Pointe shoes
When Can I Start Pointe Work?
Guidelines for Initiating Pointe Training