Are both Jack Russell Terrier and Bullmastiff types of dogs?
Jack Russell Terrier The Jack Russell Terrier is a small terrier that has its origins in fox hunting. It is principally white-bodied and smooth, rough or broken-coated but can be any colour.
Tosa (dog) The Tosa (土佐 , also called the Tosa Inu or Japanese Mastiff) is a breed of dog of Japanese origin that is considered rare. It was originally bred in Tosa (present day Kōchi) as a fighting dog and still is today.