Pigs are usually pink and have bristly fur. However, depending on the breed, they can also be brown, black, or spotted. It is often said that these animals are dirty because they enjoy rolling in the mud. In reality, they simply take a cooling mud bath in hot weather, just like elephants do. Additionally, the mud protects them from insect bites. Some people even keep pigs as pets because they are very peaceful, sensitive, social, curious, and intelligent.