odometer:
If her walking on toes doesn't bother her, why does it bother you?
If it's only because her peers tease her for it, then by insisting that the way she walks is "wrong", you're really letting those peers make the rules.When she gets to the age at which she goes out in the world, she can just wear high-heeled shoes. If she doesn't outgrow toe-walking first, that is.
Not only teasing. It will also lead to bad posture and back problems if uncorrected.