The French Bulldog is a small breed of domestic dog. Frenchies were the result in the 1800s of a cross between bulldog ancestors imported from England and local ratters in Paris .
In the UK, they moved up to become the fourth most popular registered dog by 2014. In the USA, French bulldogs moved up to be the ninth most popular AKC registered dog breed by 2014.
The origin of the modern French Bulldog breed descends directly from the dogs of the Molossians, an ancient Greek tribe. The dogs were spread throughout the ancient world by Phoenician traders. British Molossian dogs were developed into the Mastiff. A sub-family of the Mastiff were the Bullenbeisser, a type of dog used for bull-baiting.
Blood sports such as bull-baiting were outlawed in England in 1835, leaving these Bulldogs unemployed. However, they had been bred for non-sporting reasons since at least 1800, and so their use changed from a sporting breed to a companion breed. To reduce their size, some Bulldogs were crossed with terriers, while others were crossed with pugs. By 1850 the Toy Bulldog had become common in England, and appeared in conformation shows when they began around 1860. These dogs weighed around 16–25 pounds , although classes were also available at dog shows for those that weighed under 12 pounds . (source : wikipedia)