Sioux County farmer Chris Ten Napel admits he hasn’t gotten much sleep lately, maybe four or five hours tops, trying to squeeze in time to harvest crops, care for nursery pigs and haul hogs.

Ten Napel, 33, started a trucking business in 2009 on the advice of his dad, Robert, who custom-feeds hogs and couldn’t find a reliable trucker to transport pigs. Now Ten Napel said he moves about 10,000 to 15,000 pigs per week and can’t keep up...