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.
Griffon Bruxellois The Griffon Bruxellois or Brussels Griffon is a breed of toy dog, named for their city of origin: Brussels, Belgium. The Griffon Bruxellois may refer to three different breeds, the Griffon Bruxellois, the Griffon Belge and the Petit Brabançon. Identical in standard except for coat and colour differences, in some standards they are considered varieties of the same breed, much like Belgian Shepherd Dogs.