I wonder why that is. I guess dogs have been domesticated longer, so we've adapted to each other.
It was my impression that cattle were the worst: Smallpox and TB, and I believe a few others, were originally cattle diseases.
Are you sure you don't mean cowpox? That was a related disease to smallpox. Interestingly, Jennings (sp)? invented the smallpox vaccine by observing that milkmaids rarely contracted smallpox due to their exposure to cowpox.