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.
The English bulldog is a medium sized breed of dog commonly known as English bulldog or British bulldog. It is a muscular dog with a wrinkled face. It should not be confused with the French bulldog which is its smaller cousin.
The Bichon Frise is a small breed of dog of the bichon type. The name bichon comes from the French for "small long-haired dog". Bichon Frise dogs are slightly round with a cotton ball appearance and a long tail which is curly. It has a black nose and dark round eyes. They are considered to be highly intelligent and were traditionally trained to perform tricks for royalty. Bichon Frise grow to be around 9 to 11 inches tall and weigh around 7 to 11 pounds.