[TXAZ]

Sunaj,

What would you do if you were a small farmer with 160 acres and 50 - 200 hogs that chew through several acres a day?

I don't know where you're located, maybe the feral hogs aren't a problem there. In Central, South and East Texas, it's a major problem. The annual costs/impacts are over $100M in the state, plus human lives. That's not only the acre-per-weekend a small sounder / herd of 10 - 20 hogs can strip clear to a farm or ranch. It's also the massive erosion problem they create once the land is bare that small and medium farmers simply can't keep up with.
It's the threat to other small animals, typically pets that are in danger. But in some counties, 5 or 6 very dark 200 pounder's suddenly running across the highway at night have resulted in fatal accidents (in addition to the hogs).

And how many natural predators are there of the aggressive feral? Effectively zero.

Whether you think it's fair or not, feral hogs are a massive problem. The state is not interested in the 19th century British solution to the Malaysian plantation rat problem( injecting predators by bringing in 100,000 cobras from India... No rats on that peninsula, but you don't go walking in tall grass): Any predator likely to be effective against the hogs will likely enjoy slower moving livestock better.

Shooting / hunting / exterminating these creatures is a necessity: Waiting for another gestation cycle is only exacerbating the problem.