When guinea pigs chatter their teeth, it primarily means they are expressing anger, annoyance, or agitation. This behavior serves as a warning signal to others-whether other guinea pigs or humans-to back off and respect their space or territory. Teeth chattering often occurs when guinea pigs meet new cage mates, signaling a desire to establish dominance or prevent conflict, and it can precede fighting if ignored
. Guinea pigs may also chatter their teeth if they feel upset or intimidated by something, such as during grooming, nail trimming, or when a mother is protecting her babies. In these cases, the chattering is a way to communicate discomfort or a wish to be left alone
. It is important to distinguish teeth chattering from teeth grinding. Grinding often indicates pain or dental problems like overgrown teeth or mouth irritation, which require veterinary attention. Teeth chattering, on the other hand, is usually a behavioral warning rather than a sign of physical pain
. In summary:
- Teeth chattering = warning, annoyance, anger, or territorial behavior.
- Common during introductions of new guinea pigs or stressful situations.
- Can indicate a guinea pig wants space or is upset.
- Not typically a sign of pain (unlike teeth grinding).
- If persistent or accompanied by other symptoms, a vet check is advisable to rule out dental or health issues
