that website Pednaud posted pretty much proved that it's a hoax
there was mathematical evidence on that website which I thought was hilarious that stated if the pig was the size it was supposed to be than the kid would have to be like 4 feet tall. They also had non-fraud pictures of them standing next to the pig and the father was almost as tall as it.
i doubt that fat kid even killed it. Like Pednaud said, it's doubtful a husky kid could run after a pig for hours. Those things run pretty fast, don't they?