Do Pigs Really Sweat? or is it just an expression?
Pigs don't sweat much. They have ineffective sweat glands. They roll in mud to cool down. The expression "sweat like a pig" has to do with making pig iron. It has nothing to do with the animal.
I have never had a pig friend who could tell me that. However, I heard that they wallow in the mud to cool off because their body has a hard time cooling down on its own.
Not very well, if at all.Most do not have very many sweat glands if they have any at all. That is why they roll in mud, to keep cool.http://www.livescience.com/32118-do-pigs-sweat.html
They only perspire from their nose or snout.