Will a hog really kill and eat a cow?

When I first got into hoghunting with dogs, I bought some real hogdogs from a friend near Canton,Tx. This guy told about catching a hog that at that time (About 1996) was the second largest hog in the world caught alive with dogs. He had the certificate to verify this. They had the hog weighed and measured by a certified trophyologist and that's where the certificate was from. Well I didn't even know they kept records on hogs, but then a neighbor shot a hog and said it was a state record of some kind. Anyway this hoghunter had caught this 510 lb hog after some cattlemen around Canton told them they were losing baby calves and all they could find around the dead calf were hog tracks. They caught this hog in a 50 acre plot of woods surrounded by open pastures. I have no reason not to believe what they told me. This hog killed several of their dogs that day and a couple more died later.