They ain’t feral. Those pigs are domestic as it gets.

There are also a handful of hogs that seem to direct smaller groups within the precinct. These are known as “sergeants”. The sergeants don’t run everything, though. There is one animal that is the agreed upon leader of all. This one is known as a “captain”. It is the personality of this captain that sets the tone of the entire precinct. If the captain is aggressive and violent, the precinct will be aggressive and violent. When that happens, it’s time to slaughter the captain and let his carcass feed the people. After this, one must take great care in the selection of the next captain. With proper and constant care and intervention, a feral precinct can be domesticated in just a few generations.