Guinea pigs are popular pets for good reason - they’re social, expressive, and surprisingly vocal. If you've ever stopped to wonder what all those squeals, purrs, and clicks mean, you're not alone.

Add Yahoo as a preferred source to see more of our stories on Google. Some sounds are negative and others positive, the experts say (Getty Images) Pigs are noisy creatures, from their contented oinks ...

Knowing the emotional state of farmed pigs could lead to more humane living conditions for one of the world’s smartest animals. Thanks to science, we now know how pigs are feeling. Researchers ...

We all know a pig goes, “Oink,” but what is it really saying? A machine from the '80s aimed to figure that out.University researchers used a computer to decode pig noises. They were trying to ...