The dried mud acts as a layer of sunscreen to protecttheir skin from the sun. Don't try this at home kids. A pig's most acute sense is smell. Pigs are omnivores. They willeat anything humans eat and more, a lot more in fact.
Pigs gain weight very quickly.
If they eat about 3 pounds of feed, they will gain 1 pound of body weight. Compare this to chickens or turkeys where about 2 pounds of feed produces 1 pound of body weight. And in steers, about 7 pounds of feed produces 1 pound of body weight. Historically hogs are worth 35 to 55 cents per pound at market size. The main ingredient in pig feed is corn.