Bad Moon

Bad Moon is a 1996 American horror film written and directed by Eric Red and produced by James G. Robinson. The plot involves a family man who struggles to overcome the curse of lycanthropy. It stars Michael Par, Mariel Hemingway and Mason Gamble.

While making love in their tent during a work expedition in Nepal, photojournalists Ted Harrison Michael Par and his girlfriend Marjorie are attacked by a werewolf. The werewolf snatches Marjorie and Ted attempts to rescue her but gets bitten in his shoulder and thrown to the ground. Hurt but determined he crawls to his shotgun and manages to shoot the werewolfs head off but not before the beast kills Marjorie.With the intent of living in isolation Ted moves back home into a trailer in the woods hours away from his lawyer sister Janet Harrison Mariel Hemingway. One day in an effort to reach out to her and his young nephew Brett Mason Gamble, Ted calls them up and invites them for a meal at his home by the lake. Upon seeing him again the family dog, Thor, begins to sense something wrong with Uncle Ted and goes into the woods tracking a smell, which leads him to human remains hanging on a tree branch. Meanwhile, having heard of Marjories death and in an attempt at comforting her brother, Janet invites him to stay with them. Shaken and fearful of hurting them, Ted declines and Janet, Brett and Thor leave before the sun starts to set, at Teds insistence. ........

Source: Wikipedia