I lived in central Florida for 23 years, worked for Game & Fish part time when I was a student - dealt with a LOT of wild hogs. If the pig is untagged and unmarked (tattoo), it's entirely possible the pig your friend found was feral. The piglets of feral pigs are indistinguishable from those of domestic pigs (in fact, they are the same animal - Florida feral hogs are the descendants of farm stock). Often the sow is killed by traffic or hunters, leaving the offspring to fend for themselves. Pigs can make intelligent, affectionate pets...they just get so darned BIG (this can be mitigated somewhat by restricting their diet). Good luck on finding a home.