One attack vector of the disease is transmission through tick bites. Ticks then bite boars. Swine fever also takes enough time to begin acting that a herd can b

One attack vector of the disease is transmission through tick bites. Ticks then bite boars. Swine fever also takes enough time to begin acting that a herd can become infected without there being any signs till it is too late to mitigate. Swine fever can also be transmitted by feed but it isn’t clear to me how that works. Sometimes pigs are fed to pigs but I don’t see how that would lead to a supply feed infection.