The Great Dane is a large German breed of domestic dog known for its giant size. It is one of the tallest dog breeds. It is a short-haired breed with a strong figure. This dog has a long tail, and a long neck with a rectangular head. Its ears are mostly cropped. The weight of this dog is about 140 to 170 pounds in male and in females is about 110 to 140 pounds.
The Jack Russell varies widely in size. They vary from 10 to 15 inches in size. The Jack Russell has a great sense of smell and tracking instinct. The Jack Russell is an intelligent dog. It is popular due to its size, good temperament and lack of health problems.