noise while petting

Question
I have a baby pig. When I pet it on the rear it makes a purring-like noise. However, based on listening to pig noises on the internet it sounds similar to a noise they make when they are scared or nervous. Can you interpret if my pig likes that or not? Thanks!

Answer
Vicky,

 Your little baby Guinea Pig likes it. They make a purring-like noise when you pet them in just the right spot.
Because your pig is a baby, he/she sounds different then adult Guinea Pigs sound.
 Your little Guinea Pig is happy as can be. So just keep up the good care.
                            Jules