Matagi said:
Aflip side to that though is they do a great job on helping the soil take in and retain water from the rain. Most of the rain water that we get doesn't alway get absorbed into the soil so some of the major rooting I have seen shows great potential for new growth which can benefit other wildlife. IMHO I think the hogs will help with oak production but I have seen what they can do to turkey meats and fawns so some of our native animals have been impacted by the hogs.
Alright, I'm jumping in. Matagi, you seem well versed in the area of feral hogs but from my perspective they will do anything BUT help out new growth and benefit our native wildlife. I lived in central and northern California for several years and in that time I hunted wild hogs and spent A LOT of time on friends ranches that had wild pigs on them...and the pigs did absolutely nothing for the local flora or fauna.
I have also raised pigs for several years. While domestic pigs are not nearly as voracious as their wild cousins they have one thing in common; they love fresh sprouts and acorns. Feral hogs will root in and around oak groves (view the pictures above for evidence) and will eat any young oak tree sprout before it even has a chance to cast a shadow. They love sprouts because they're soft and palatable. Hence why they root around; to get to the good stuff!
Deer, elk, turkey, bears (for the most part) tend to eat things above the soil, not below it, and therefor are able to sustain themselves effectively. If given the chance, pigs will eat themselves out of house and home. They are fast breeders (3 months, 3 weeks, and 3 days for gestation) and will devastate an area until there's nothing left, and move on.
Now, with that being said, I LOVE killing hogs. They're fun to hunt, tasty, and good practice for deer or other game. And while I like the idea of having pigs in my own backyard, I'm afraid they'll be a bigger detriment, not benefit, to our local game. Just my opinion.