Guinea Pig Health
Common Guinea Pig Illnesses: Symptoms, Red Flags & When to See a Vet
This guide explains common health problems seen in guinea pigs, the early signs owners often notice, and when veterinary care is needed. It supports early action, not self‑diagnosis.
Important: Guinea pigs hide illness extremely well.
If your guinea pig stops eating or producing droppings, seek veterinary advice promptly.
How to Use This Page
This page helps you recognise common illness patterns and understand when action is needed. It does not replace veterinary diagnosis, tests, or treatment plans.
While not all illnesses can be prevented, providing a clean environment, good nutrition and a spacious C&C cage for guinea pigs can help support overall health and reduce some common husbandry-related problems.
Not Eating / Gut Slowdown (GI Stasis)
One of the most serious situations for a guinea pig is when the gut slows or stops. A guinea pig that is not eating is always a concern.
- Reduced or no appetite
- Fewer, smaller, or no droppings
- Lethargy or hunched posture
- Weight loss
Action: If your guinea pig is not eating and droppings reduce or stop, contact an experienced exotics vet as soon as possible.
Dental Problems
Guinea pig teeth grow continuously. Dental problems are common and often develop gradually.
- Drooling or wet chin
- Selective eating or dropping food
- Weight loss despite eating
- Reduced interest in hay
Dental problems require veterinary assessment and cannot be safely managed at home.
Respiratory Infections
Respiratory infections can progress quickly in guinea pigs and should never be ignored.
- Noisy or laboured breathing
- Nasal or eye discharge
- Sneezing or coughing
- Lethargy
Action: Veterinary treatment is required. Early treatment improves outcomes.
Skin Issues & Parasites
Skin problems may be caused by mites, fungal infections, or environmental factors.
- Hair loss or thinning
- Dandruff or scaly skin
- Scratching or discomfort
- Sores or scabs
Guinea pig skin issues often require specific treatment — avoid using medications intended for other pets.
Urinary Problems
Urinary tract issues, including bladder stones, can occur in guinea pigs.
- Pain or squeaking when urinating
- Blood in urine
- Straining
- Reduced appetite
Action: These symptoms require veterinary assessment and imaging.
Heat Stress
Guinea pigs are highly sensitive to heat. Overheating can become life‑threatening.
- Lethargy or collapse
- Rapid breathing
- Drooling
- Loss of coordination
Prevention matters: provide shade, airflow, and temperature control during warm weather.
When to See a Vet Immediately
- Not eating for several hours
- No droppings
- Difficulty breathing
- Blood present
- Sudden collapse or extreme lethargy
Guinea pigs can decline very quickly. When unsure, seeking veterinary advice is the safest option.