Halloween animation POLL (Patreon)

I was thinking in doing something special to Halloween , so i decided to try and create an animation for this day with something that represents it properly. This animation will feature a girl milking  some kind of creature/monster. 

WHICH KIND OF CREATURE DO YOU THINK IT WOULD BE THE BEST FOR THIS ANIMATION?

PS: I won't list Werewolves coz it goes against Patreon policy.