DD, aged 10, has developed what can be described as a "nyah-nyah-nyah" tone in her voice, a way of speaking which makes it sound as if she is twisting herself up inside before speaking, and choosing to spit bile and invective at the world.
It's really unsettling, as she can be a sweet and loving and funny girl so much of the time.
Wondering how others have dealt with this... I'm sure we are not alone.