How do animation files work for the animals?

[Kalrius]

I want my character to be able to change into a hound from the game, but whenever I try to use the animation files from the game he just turns invisible instead... am I missing something?

UPDATE: I now see the hound animation by moving after adding inst.AnimState:SetBank("hound"). I have no idea what that does, but I saw it used. I only see the animation when moving. If I stand still he is invisible again. Also, when I try to switch back to human form he is always invisible (assuming because I have no SetBank for that one, but even when I added that line nothing happened).