MSD Manual

Please confirm that you are a health care professional

honeypot link
Pet Owner Version

Introduction to Description and Physical Characteristics of Dogs

By

John A. Bukowski

, DVM, MPH, PhD;


Susan Aiello

, DVM, ELS

Medically Reviewed Jul 2011 | Modified Oct 2022

Dogs are descendents of wolves that roamed wild over much of the world in ancient times. People have associated with dogs for thousands of years, originally domesticating them as beasts of burden and guard animals. Today, there are still many working breeds, and the service roles of dogs have greatly expanded to include assisting disabled individuals (for example, those with visual or hearing impairments), working with human law enforcement by sniffing out illegal drugs and other contraband, locating survivors in search-and-rescue missions, and even using their incredible sense of smell for early detection of cancer cells in human patients. Of course, the primary role of most dogs is that of loyal companion.

quiz link

Test your knowledge

Take a Quiz!
iOS ANDROID
iOS ANDROID
iOS ANDROID
TOP