You are right, it was a sow, but the OP's question was.
"I was just wondering if it was safe to eat a huge wild hog and if it is safe how do I make sure it does not go bad?" He didn't ask about boars and sows, he asked about huge hogs in general.

There are some things hogs eat that will make their pork some pretty rough stuff, as table fare goes. And it often shows up in hogs from certain areas. On the other hand, some orchards produce some fantastic wild pork. Think nut orchards. Peanut fields(?)

There's a place I know outside of Hilo, that has boars with awesome tusks, but nobody will even chance'um for eat. They scavange behind a beef slaughterhouse.

For over two months most of the wild hogs in this area have been dining on corn, milo, soybeans, livestock pellets, creep feed and blackeyed peas from deer feeders. They are also on the wheat fields.

Today my hog trapping partner took a big boar from one of our traps. That hog field dressed 312 pounds and was moderately fat. The hog was cleaned and scraped. He will be cooked in the ground on New Years day.

All the bad tasting hog meat i have ever encountered was contaminated and/or rotten hog meat.

This hog weighed 384 pounds on the hoof.

http://i290.photobucket.com/albums/l...qr/Osama-1.jpg


The wife of the man i gave that hog to made some of the best stuff i ever ate from that animal.

Not exactly sure what your concern is here but I've wondered about wild hog myself, so did a little research and this is some of what I found:
http://noble.org/ag/wildlife/feralhogs/disease/ .
As w/any wild game, proper preparation is wise.