[That’s what they said about carrier pigeons. ]
Passenger pigeons aren’t particularly bright. Pigs are some of the smartest land mammals. They can undo latches. They’re smarter than dogs and almost as smart as the lower primates.
https://woollymammothtc.wordpress.com/tag/poplar-springs/
Pigeons are actually one of the more intelligent birds, but even with the difficulty of hunting them and their vast numbers diligent hunters and trappers drove them into extinction.
I am confident we could do the same thing to feral pigs, where doing so might be a good thing, unlike the loss of the carrier pigeon.