I am suggesting that the craze for flat-faced dogs was produced by the same collective mob mentality that produced the slaughter of nearly half a million pets in 1939. Both the pet massacre and the bulldog fad resulted in massive animal suffering. The difference is the speed of the cycle. It only took a few days for the London pet slaughter to run its course. But based on our studies, it will probably take 10 or 12 years for French bulldogs to return to their historic modest level of popularity. The good news is that veterinarians and animal protection organizations are now campaigning against ownership of French bulldogs and other brachycephalic breeds. The bad news that the demand for genetically deformed flat-faced cats is on the rise .