What is the test for a dog's propensity to bite?

British Columbia, Canada

The following excerpt is from Weeks v. Baloniak, 2003 BCSC 1684 (CanLII):

In the plaintiff’s submission, when a dog viciously barks and lunges on its chain and often gets loose, that is enough to prove a propensity to bite, relying upon Woods v. Standish [1991] B.C.J. 1004 (B.C.S.C.).

Other Questions

Is there an Occupier’s liability for damage caused by a dog on a property owned by the Respondent? (British Columbia, Canada)