Found a female werewolf transformation in the new PS4 game, Bloodborne.
https://www.youtube.com/watch?v=yAgEQwX6q6Q
Happens at the beginning of the video, the rest is a boss fight against the giant werewolf she becomes. You don't see much, it's pretty much just her shadow you see change, but it's something. I don't know if there are any more female boss transformations, but I doubt it. I wasn't sure their would be any female werewolves in this at all, but there is at least this one.