BLOOD FREAK (1972)

Writer: Steve Hawks & Brad Grinter

Director: Steve Hawks & Brad Grinter

Starring:
   Steve Hawks as Herschel
   And a bunch of other people

Synopsis: An upright young man named Herschel falls into the wild world of drugs and turkey testing.  After a bad reaction to a combination of illicit substances and bioengineered turkey, Herschel transforms into a strange half man, half turkey abomination with a taste that can only be slaked by draining the blood from addicts.

I couldn't make this up if I tried.