A few around here are still used for hogs.  A lot of the time they are used as an overflow in the event there are more pigs than what can be held in a confinement building.  Sometimes they are used to finish the slower growing pigs if they did not make market weight before the confinement building had to be emptied and washed before the next group.

Some are used for goats, sheep, small calves, storage, but most are sitting empty or have been cleared away.