Bad Moon (1996)
A photo-journalist and his girlfriend are attacked by a werewolf while visiting Nepal. His girlfriend is killed by the beast but he is bitten and has to live with curse of lycanthropy. He moves back to the US and tries to deal with the monster inside him however his sister invites him to live her and her son. He slowly starts to loose control as each day goes especially rivaling with e family dog, Thor, who could be the families only hope.
Based on the novel Thor by Wayne Smith.