Just as an aside, a bit of interesting info I learned in my reprodution class the other day. The 'runt' of the litter becomes the runt because, a couple of weeks after fertilisation the embryos finish their floating around business and attach to the endometrium of the uterus. Spacing of embryos is really important in pigs, seeing as how there's so many of them, and they have to spread out in such a way that the mother recognises that she's pregnant, so her body supports rather than terminates the pregnancy. So anyway, the embryos are all moving around a little to get themselves in the best position, and invariably one gets stuck in a spot that has a lower number of caruncles (attachment points), and a decreased supply of blood. And suprise suprise, poor little sucker get destined to be the runt - destined to be a poddy pig if it was unlucky enough to be born when I was a toddler and oh so obsessed with piglets. Or destined to be MikeC's dinner.
I love pigs, they do actually make really good pets. I don't love them so much when they're sinking their teeth into your thigh and somehow squealing at the top of their voice at the same time, though.