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.

STORY: Do these pigs sound happy or sad? European scientists have developed an artificial intelligence algorithm capable of finding out. Their goal is to create a tool that can decode pigs' calls and ...

Wheeking, purring, chutting, chirping and chattering. For small animals, guinea pigs can make big noises and, according to experts, they're communicating with each other - and with us. Sue Tate has ...