Santo vs. las lobas 1976, Santo vs. the She Wolves ESP+(eng sub)

Somewhere in a small village in Mexico, a werewolf clan selects a new queen. Once installed she plots the end of the Harker family, who are hated because they are immune to the curse of lycanthropy. The few remaining Harkers ask for Santos help, because hes a silver symbol and, well, you know werewolves. Santo at first refuses to believe this nonsense but after being attacked by werewolf after werewolf, and seeing a Harker nearly get assassinated, he grudgingly joins the fight against the furries. As Santo has been bitten (it took some effort, the dog was remarkably reluctant for a Shepherd) he has until the next red moon to exterminate the entire clan or he will turn into a werewolf