there are many interesting things to know about pigs. they might look very smart but I think you would be fascinated to know how intelligent they really can be. they have are smarter than dogs, some primates and even young human children. betcha didn’t know that. all pigs do not have any sweat glands so when there hot that is why they are rolling int he mud. pigs are also very sanitary, they like to keep there bathroom away from the kitchen and living room. one question I have about pigs is why their tails are swirly. also why their hair is hard. and how much they need to eat a daily.