Ginger Snaps (2001)

Ginger and Brigitte, two sisters trapped in suburbia, are obsessed with mayhem, torture and death until they get a taste of the real thing. Bitten by a wild animal, Ginger begins to mutate into a sexy, uncontrolled woman, with some nasty canine tendencies. Is it a virus? Is it a curse? Or the first step towards becoming a vicious werewolf!