Blood Freak (1972)

Director: Brad F. Grinter, Steve Hawkes
Cast: Bob Currier, Dana Cullivan, Dolores Currier, Heather Hughes, Larry Wright, Randy Grinter, Steve Hawkes, Tera Anderson

Synopsis:

A biker comes upon a girl with a flat tire and offers her a ride home. He winds up at a drug party with the girl’s sister, then follows her to a turkey farm owned by her father, a mad scientist. The father turns the biker into a giant turkey monster who goes after drug dealers.