Guinea pigs are quite social and can be vocal about it. The most frequently heard sound from your guinea pig is a high-pitched squeal that is associated with a call for attention. This squeal is used to show excitement over feeding time or just to see you. It is a funny sound and a pleasure to hear, knowing your piggy is happy. Guinea pigs will also rumble and make a purring sound. It almost appears like your pig is talking to himself. This is a clear sign of contentment. Your pig may chatter his teeth and this is not so welcome. It is a sign that your guinea pig is annoyed and may act aggressively. Your pig may bite you or fight with other guinea pigs in your household. A really high pitch squeal with a plaintive sound may indicate your pig is hurt or in pain. Learn more from your Warminster, PA veterinary clinic.