Pig
Pigs are the only mammal found all over the world. They are one of the cleanest animals in the world. The only reason they roll in the mud is to keep cool.
They have no sweat glands, so cannot perspire. Pigs have sensitive snouts. They can smell up to 25 feet underground. This is why they are used to help law enforcement teams sniff out drugs. The by-products of pork can be found in thousands of everyday items. Candles, footballs, buttons, hair brushes, glass, floor waxes, crayons, cosmetics, chalk & shoes.