Possible Daoist origin of a Chinese expression

Gina Cogan's picture

Greetings,

A friend is writing a book about contemporary Taiwan that has a sociolinguistic component.  She is writing on the expression 灑狗血, or making a scene, and she has heard that it is refers to a practice in Daoist exorcism in which the priest uses dog's blood when all other methods have failed.  She asked me if I had any ideas, and, not being a specialist in either China or Daoism, I thought I would post here.  Does anybody know if this explanation is correct?  Also, if it is, can you point her to a good citation for it?

Thank you very much.

Gina Cogan

Independent Scholar