Bites in Calgary are assesed on the Dunbar scale of wound pathology. Level 3.5 was added in 2013. There are no recorded level 6 bite attacks causing death from 2009 to 2019.
Level Description No level assigned No level assigned indicates bites with insufficient evidence to determine severity of bite Level 1 Dog growls, snarls, no-teeth touching skin Level 2 Teeth may touch skin but no puncture, minor scratches or lacerations Level 3 Punctures with 1 to 3 holes, single bite with no tearing or slashing Level 3.5 Multiple level 3 bites Level 4 Two to four punctures with considerable bruising; dog clamped down and shook from side to side. Level 5 Multiple level 4 bites; a concerted, repeated attack causing severe injury Level 6 Any attack causing death