We moved the sows and their piglets out to a new pasture the other day. I had been meaning to do it for some time, but it kept getting put off for other, more time pressing jobs. Nevertheless, all 45 are now out on a large area with lots of grass and alfalfa. It may surprise some people, but pigs will graze, and can get a fair amount of their diet from grass and legumes. 

The pigs seemed extremely happy with their new home, and spend a lot of time roaming the field. The piglets have access to a self feeder with grain as well, and I feed the sows some grain morning and evening to compliment their grassy diet.