Signs Your Guinea Pig Needs a Vet
Guinea pigs are prey animals — which means they instinctively hide signs of illness until they can’t anymore. By the time a guinea pig looks visibly sick, the problem may already be serious. As an exotic veterinary assistant, I’ve seen how quickly things can escalate when early signs are missed.
Here are the five warning signs every guinea pig owner should know.
1. Labored Breathing or Crusty Nose
Upper respiratory infections (URIs) are one of the most common and dangerous guinea pig illnesses. If your guinea pig is wheezing, clicking while breathing, has discharge from the nose or eyes, or seems lethargic, get them to an exotic vet immediately. URIs can become fatal within days if untreated.
What to watch for:
- Audible clicking or wheezing when breathing
- Discharge from the nose or eyes
- Sneezing more than occasionally
- Puffed-up fur and reluctance to move
Prevention tip: Dusty bedding is a major contributor to respiratory issues in guinea pigs. Switching to fleece cage liners eliminates airborne dust and wood phenols entirely.
2. Not Eating or Drinking
Guinea pigs should be eating constantly — their digestive systems depend on continuous intake of hay and fiber. If your guinea pig stops eating for more than 12 hours, this is an emergency. GI stasis (a shutdown of the digestive tract) can be fatal.
What to watch for:
- Refusing hay, pellets, or vegetables
- Smaller or absent droppings
- Hunched posture or teeth grinding (a sign of pain)
- Weight loss — weigh your guinea pig weekly to catch gradual changes
3. Swollen or Bleeding Feet (Bumblefoot)
Bumblefoot (pododermatitis) is a bacterial infection of the foot pads caused by prolonged contact with wet, rough, or dirty surfaces. It starts as redness or calluses on the bottom of the feet and can progress to open sores and deep infection.
What to watch for:
- Redness, swelling, or scabs on the bottom of the feet
- Limping or reluctance to walk
- Sores that don’t heal
Prevention tip: Keep your guinea pig’s living surface clean and dry. Our Clinical Series fleece liners wick moisture away from the surface, significantly reducing bumblefoot risk compared to disposable bedding.
4. Drooling or Difficulty Eating
Guinea pig teeth grow continuously throughout their lives. Without enough hay to wear them down, teeth can become overgrown, misaligned, or develop painful spurs that cut into the cheeks and tongue. This is called malocclusion.
What to watch for:
- Drooling or wet chin
- Dropping food while trying to eat
- Preferring soft foods over hay
- Weight loss despite interest in food
This requires a vet visit — overgrown teeth need to be filed or trimmed under sedation by an exotic vet experienced with guinea pig dentistry.
5. Lethargy or Unusual Behavior
You know your guinea pig’s personality better than anyone. If a normally active pig suddenly becomes quiet, hides more than usual, or stops responding to the sound of a treat bag, something may be wrong.
What to watch for:
- Sitting puffed up in one spot
- Not reacting to food or interaction
- Tilted head (possible ear infection)
- Excessive scratching (mites or fungal infection)
When in Doubt, Call Your Vet
Guinea pigs decline quickly. If something feels off, don’t wait — call an exotic veterinarian who specializes in small mammals. A regular dog-and-cat vet may not have the training to properly diagnose guinea pig illnesses.
Need someone who understands guinea pig health to care for your pets while you’re away? Learn about our in-home exotic pet sitting and boarding services in San Francisco. Browse our Small Pet Resources for more care recommendations.