is a breed of domestic dog. They are the result of a cross between Toy Bulldogs imported from England and local ratters in Paris, France, in the 1800s. 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. This is because some colors come linked with genetic health problems not usually found in the breed. Although this is heavily disputed by some organizations, it has been suggested that the health, hair and skin conditions are caused by the color pigment (melanin) clumping in the hair shaft itself. Even dogs that are not blue can develop 'blue dog alopecia' or canine follicular dysplasia. There are several celebrities who own French bulldogs whom are very notable.