My cousins raised all their own meat; pigs, cows, chickens, squab, etc. For the larger animals, they had someone come out to butcher them. I've also seen mobile butchers at the county fair who butcher the auctioned animals. BTW, thats also supposed to be a good way to buy a whole hog, etc, rather than raising one yourself. Some of the 4H people I know, said that they sell their pigs at the fair and then buy someone elses to eat themselves. This way they're not eating the pig they had come to know.
This site has some good information on butchering.