A large dog is typically defined as a breed that weighs over 50 pounds and stands at least 20 inches tall at the shoulder. Common examples of large dog breeds include Labrador Retrievers, German Shepherds, and Golden Retrievers. These dogs often require more space and exercise compared to smaller breeds, making them suitable for families with ample room. Large dogs are known for their strength and loyalty. They can serve various roles, such as family pets, service animals, or working dogs in roles like search and rescue. Proper training and socialization are essential to ensure they are well-behaved and safe around people and other animals.