Only thing I know of hogs is what some friends in TX told me that a sow will birth 7 piglets and raise 8!
They can have 14 or more, and a good "momma" sow will raise a dozen out of the 14...plus they give birth twice a year on average, and sows can start reproducing at 8 months. Doesn't take long for them to take over an area, especially if they have no predators.
We have them in Northeast MS. For years they were fairly close, but not right on top of us. That has changed--it seems due to some idiots "stocking" them.
I can't see how the pay places will stay in business--people will be begging folks to come shoot the dang things. They can destroy a planted field literally overnight.