guinea pigs sounds and body language

The Sound	The Meaning
Grunts, gurgles, squeaks	This means contentment, comfort, contact with other guinea pigs through the sound they make.
Squeals, shrieks	This sound can be a warning, young's cry of loneliness, pain or fear
Squeals, wheeting	This means that they want food or are seeking your attention.
Cooing	This sound is usually used for reassurance, usually uttered to young
Rumbles	This sound can be a warning, dislike of an action or sound
Hisses, teeth clacking	This mean that your guinea pig is going to be aggressive or he's threatening opponent or it's a warning
Rattling, rumbling	This is the arousal sounds for both male and female or lower rank female greeting a higher rank female

Body Language	The Meaning
Stretches head forward	This means watchfulness
"Popcorns"	High spirits
Stretches	Comfort, relaxation
Shows teeth with mouth open	This is used by females to deter advances from a male, and by both sexes as a threatening posture
Rising up with legs stiffened	Threatening
Touching noses	Sniffing contact