A fast spreading animal disease forces farmers to kill of all pigs in the area this year.
You lose all pigs.
The player loses all pigs.
This report identifies diseases as one of the main limitations in pig production in developing countries:
“Urban and Peri-urban pig farming in developing countries, with a focus on the African continent”, by Jacobson, Magdalena and Lindberg, Jan Erik and Lundeheim, Nils (2014).
“6 most common pig diseases worldwide”, by Zoe Kay: