alt Hacker NewsHorses are especially susceptible to *everything*.
Millenia of selective breeding to try for the healthiest strongest animals we can, and they're still shit.
They'll get ill if they breathe wrong. They'll get ill if they eat a mouthful too much or too little of grass that's ever so slightly too green. They'll get ill if it's too rainy or not rainy enough.
How the hell did they even evolve?
Selective breeding for being useful to humans, not for being able to survive on their own.