Yes, but remember that pigs are probably the only animals that are grown only for their meat. Cows, sheep and goats are grown for their milk also, sheep for their fleece, chicken, duck and geese for their eggs etc. Eggs and dairy are valuable sources of protein that can last a lot longer than slaughtering and eating the animal that produces them. So, in many places, where people raise animals they keep them alive for the small but steady supply of eggs and milk, and only kill them for their meat on special occasions (like religious festivals and so on).

That's my experience anyway. I spend my summers in a friend's farm and they have a small army of chickens, a plattoon of goats and in different times, a couple of pigs or so. We get fresh eggs and fresh goat's milk, but all the meat we eat is bought from outside the farm. It seems to be a very good deal actually, which was surprising to me when I first realised it, because of course the chickens and goats have to be fed. Then again- they often eat what we do (or rather, our leftovers).