Noticed that my Prezewalski's horses suddenly had an outbreak of foot and mouth disease. AFAIK, this disease affects even-toed ungulates, not odd toed ungulates (also it's very rare in camelids). Cattle, sheep, goats, deer, and pigs are animals that get it. I've never heard of a zoo outbreak in the US (there hasn't been an agricultural outbreak here in ages, though they had that awful outbreak in farm animals in the UK and Europe in 2001), but if there was one it would spread through the even-toed ungulates like wildfire.
I'm not sure how the diseases work in this game in general, but I'm pretty sure I've seen others affecting the wrong species.
I'm not sure how the diseases work in this game in general, but I'm pretty sure I've seen others affecting the wrong species.