A young dog is called a puppy. Puppies are typically referred to as such from birth until they reach about one year of age, although the exact age can vary by breed. During this phase, they experience rapid growth and development, engaging in playful behavior that helps them socialize and learn important skills. Puppies require special care, including appropriate nutrition, vaccinations, and training to ensure they develop into well-adjusted adult dogs. Their playful nature often endears them to families and individuals, making puppies a popular choice for new pet owners looking for a furry companion.