Creating transforming / "Were-animal" characters?

[RavenRainbow]

Hello! Sorry if this is a bit of a silly question, but I can't seem to find it anywhere.

I know that Woodie has the ability to change forms/turn into were-creatures, but I was wondering if there was a way to do that for a modded character. And, if so, would it be possible to have a custom animation for it aside from just a 'retexture' of the werebeaver/etc model? I know that changing the player character animations are damn near impossible, but. Basically, I'm making a vampire character, and I wanted to give her a bat (or batilisk, since i could simply re-use the animations with a slight recolor/retexture) form. Preferably one she can turn into at will, but I'd even settle for a totem/forced system like Woodie.

If it's not possible, no biggie. But if it is, a template or some help on how to make it work would be amazing. Thank you!