I knew my bulldog was a Modern Dog

bio-bloger: "They found that most breeds of dog fall into four groups-three 'modern' categories and one 'ancient' group that may date back to antiquity.
The modern categories include breeds that have been around for fewer than 400 years:

Working dogs/guard dogs, e.g., mastiff, bulldog, boxer "

-I think bulldogs may be even more modern, about 200 years max.
E.S.