There's also something called reverse sneezing. It sounds scary but it's usually fine. What happens is something irritates their throat, they start sucking air in really fast, and that results in this ...

At any given moment, there are as many as 12,500 Duroc hogs snorting around the barnyards of Imani Farms, a pig farm in southwestern Ontario. The farm’s pens are a cacophony of squeals, screams, barks ...