Dog bite levels, known as the Dunbar Bite Scale, classify the severity of dog bites on a scale of 1 to 6, ranging from aggressive behavior without skin contact (Level 1) to fatal attacks (Level 6). Key factors in classification include whether teeth touched the skin, if punctures occurred, the depth of wounds, the number of bites, and the presence of deep tissue damage. This scale helps evaluate the seriousness of an incident and is used in legal and veterinary contexts.