Fast-multiplying, destructive wild hogs have now been spotted in nearly 21-percent of Pennsylvania counties. A recent study says feral swine, also known as wild boar, wild hogs, or razorbacks, are one of the fastest-growing invasive species. Feral hogs will eat just about everything, including crops. Data shows that 40 years ago, swine had presence in only 20 states. Now, the animals can be found in 36 states as their range expands westward and northward. Hunting feral hogs is completely unregulated in Pennsylvania. They can be taken 365 days a year in the state without a bag limit.