Companion Animals

Guinea Pig Dental Disease and Welfare

Dental disease is the leading cause of illness and death in guinea pigs, with molar overgrowth causing starvation and pain in a condition that is often missed until advanced.

Key Facts

Molar overgrowth (malocclusion) is extremely common in guinea pigs
Signs include weight loss, reduced food intake, drooling, and wetness around mouth
Diagnosis requires examination under general anaesthesia with mouth gag
Regular dental filing every 3-6 months is required for affected animals
Prevention requires unlimited timothy hay to maintain molar wear

Welfare Considerations

Dental malocclusion causes severe suffering through inability to eat, chronic pain, and secondary starvation. Many cases go undetected because guinea pigs conceal illness. Regular weight monitoring and prompt investigation of any reduction in food intake or weight are critical welfare measures.

What You Can Do

Ensure unlimited access to grass hay (timothy or meadow) as the primary diet
Weigh guinea pigs weekly to detect early weight loss
Seek examination by a rabbit and rodent specialist vet for any suspected dental issues
Monitor closely for drooling, food dropping, or reluctance to eat
Discuss dental monitoring schedules with your exotic animal vet