A pet dog is a domesticated animal that is often kept for companionship and enjoyment. Dogs belong to the species Canis lupus familiaris and are known for their loyalty and playful nature. They come in various breeds, sizes, and colors, each with unique characteristics and temperaments. Pet dogs require regular care, including feeding, grooming, and exercise. They thrive on social interaction and often form strong bonds with their human families. Training is essential for good behavior, and many owners teach their dogs commands and tricks to enhance their relationship and ensure safety.