Full Moon!

Legend Of The Werewolf (1975) : A baby is brought up by wolves after they kill his parents. As a lad he is taken in by a second-rate traveling circus show, but one night when he is older he kills one of the troupe and runs away to Paris. Here he gets a job in a rundown zoo as a keeper and falls for a prostitute girl who works in the local brothel. His jealousy brings out his wolf side, whenever the moon is full it changes him into a werewolf so that he can kill her clients.