The term "pet dog" refers to a domesticated dog that is kept primarily for companionship and enjoyment, rather than for work or show purposes. These dogs are often treated as members of the family and are cared for by their owners in various ways such as providing them with food, shelter, exercise, medical care, and love. Pet dogs come in many different breeds and sizes, and they can serve a variety of functions within households, including providing protection, companionship or assistance to individuals with disabilities. Overall, pet dogs are valued for their loyalty, affection, and ability to bring joy into people's lives.