Animal science refers to the biological science and management of livestock, including cattle, horses, sheep, pigs, and fowl etc. Zoology is the scientific research of the structure, physiology, classification, distribution and behavior of animals. Humans have found different uses for pets in disciplines such as sports, entertainment, manufacturing, companionship and scientific research. Coupled with food production uses, we discover that animals are actually central to all of our existence, whether we realize it or not. As agriculture and its livestock are vital to our livelihood, they have become a key aspect of our culture, our impact on the environment and the direct or indirect effects of our daily activities. A more sedentary lifestyle began with the domestication of animals. Livestock provide a secure source of food and clothing. A reliable food supply meant a rise in the population and more individuals made it possible to sub-divide labor within the community. Many scholars believe that without the domestication of animals, humans would never have been civilized. This volume introduces domesticated animals as those that are useful in the home and are easily raised and cared for by humans. Some common domesticated animals include, horses, cattle, dogs, sheep, buffaloes, and poultry.