Wow, thanks for all the input!
Let's see:
There will be more than one pair of breasts or teets (she is a she-wolf after all).
There will be a muzzle and muzzle growth.
There will be more of her face (I'm a fan of bladder effects too from 80s movies).
No teeth or nails falling out. No skin ripping. The transformation is about body horror, the body being forced into a new form.
There will be no drool. I never even considered it, and my tech can't do it anyway.
Sorry, I'm not planning on doing a tail (yet). That may change.
Inspirations include:
AWIL
The Howling
UK Being Human
Game of Werewolves
The Lycanthrope
My Lupine Life