If you are going to continue to do this, you may want to consider building an automatic feed box. My buddy feeds 6 pigs at a time with a feeder he built and an automatic water valve. The feeder is tall and narrow with a small slot at the bottom that allows a little bit of food to go into a tray on the front. I think his holds 300 pounds of feed when full. It would save you a lot of time.
Jim Altmiller