| Allergies. You end up with a large segment of the population who sneezes a little bit, which is sort of annoying but sort of okay. You end up with a small segment of the population with asthma attacks, anaphylaxis, and other life-threatening conditions. Universal use of dogs would mean that there would be people who simple cannot travel, ever, anywhere beyond driving distance. There's a small war between extremist dog-owners (the ones who believe dogs are people too, and sneak them into all sorts of places dogs aren't allowed as "activism") and people with severe allergies. |