A dog nip is more of a bruise, or a slight tissue tear that requires no medical attention unless it becomes infected. Generally these wounds heal quickly with little to no complication, and were warning gestures from the dog. Or the dog's teeth nicking the person they may have been playing with.
A bite, normally is a puncture wound that may require antibiotics and stitches due to the deepness of the puncture wound. These can either be treated at a local physician, or at a hospital if the puncture is deep enough. Bites are generally delivered by the dog who instantly releases after the fact. Most dogs that bite like this are either frightened or territorial
Severe bites are those that not only puncture, but lacerate the skin. These are kind of bites are almost always hospitalized due to the deepness of the wound and the highly likeliness of infection and instant medical attention. To keep this from being labeled a mauling, the surface area should be relatively small compared to the location of the bite
A MAULING OCCURS WHEN LACERATIONS ARE EITHER VERY LARGE, NUMEROUS , OR MORTALLY WOUNDING. THEY ALWAYS NEED MEDICAL ATTENTION IN THE ER AND THE DOG ALMOST ALWAYS IS EUTHANIZED.