Can Someone Help Me Identify This Sound?

[koella]

My guinea pig has been making this sound for the past few days when I pet her. In this particular recording, she's lying down in her fleece cozy while I'm petting her. I can't tell if this is a "this is irritating please stop and leave me be" kind of sound or a "this is very nice and relaxing" type of sound.

You can hear my attempted recording here (Sorry for the bad quality. You might have to turn up your speakers. She really only does it for the first 15 seconds)

http://vocaroo.com/i/s1eubeGrpwtS

 

[Wiebke]

I am sorry, I couldn't hear anything even with my speakers turned up fully.

 

[Dindypig]

this link might help

https://www.google.co.uk/search?q=g...hannel=sb&gfe_rd=cr&ei=gXOlU-iVEaSA7QbLlYHwBQ

 

[koella]

Wiebke, that's ok. Thanks for trying! Maybe I'll get another, better recording...

Thanks for the link, Dindypig!