Guinea Pig Health at a Glance
Guinea pigs are 'prey animals' that hide illness until it's severe — daily health checks are essential for early detection.
Common Guinea Pig Health Issues
Guinea Pig Health Issues Guide
| Health Issue | Symptoms | Urgency | Prevention |
|---|---|---|---|
| Respiratory infection | Sneezing, nasal discharge, lethargy | Emergency | Clean bedding, no drafts |
| Scurvy (Vit C deficiency) | Limping, rough coat, poor appetite | High | Daily vitamin C (20-30 mg/kg) |
| Dental malocclusion | Drooling, weight loss, picky eating | High | Unlimited hay, chew toys |
| Bladder stones | Straining to pee, blood in urine | Emergency | Low-calcium diet, hydration |
| Bumblefoot | Sores on foot pads, limping | Moderate | Solid floors, clean bedding |
| Ovarian cysts | Hair loss, swollen abdomen | Moderate | Spay if not breeding |
Guinea Pig Health Checklist
| Weigh your guinea pig weekly — weight loss is the earliest sign of illness | |
| Provide unlimited timothy hay for dental wear and digestive health | |
| Give 20-30 mg/kg of vitamin C daily through veggies or supplements | |
| Check teeth monthly — look for drooling, difficulty eating, or weight loss | |
| Keep bedding clean and dry to prevent bumblefoot and respiratory issues | |
| Quarantine new guinea pigs for 2 weeks before introducing to existing ones | |
| Assume guinea pigs from pet stores are healthy — they often have URIs or mites | |
| Skip vitamin C — deficiency causes scurvy within 2-3 weeks | |
| Use wire-bottom cages that cause bumblefoot | |
| House guinea pigs with rabbits — they carry Bordetella that is deadly to guinea pigs |
Guinea pigs hide illness instinctively. A sick guinea pig that stops eating is in crisis — GI stasis can develop in hours. Never wait to see if they 'get better on their own.'
Vitamin C is not optional for guinea pigs. Unlike most mammals, they lack the enzyme to synthesize it. Fresh bell peppers, kale, and vitamin C supplements are essential daily.
Common Guinea Pig Health Problems and How to Spot Them
Guinea pigs are hardy animals, but like all pets they're vulnerable to specific health conditions. They're also prey animals who mask illness — by the time symptoms are visible, a condition may already be advanced. Knowing the most common guinea pig health problems and their warning signs gives you the best chance of catching issues early.
🚨 Emergency Signs — Vet Same Day
- Not eating or drinking for 12+ hours
- No droppings
- Labored breathing or wheezing
- Tilting head or loss of balance
- Seizures or paralysis
- Visible blood in urine
- Swollen abdomen
- Inability to walk
Vitamin C Deficiency (Scurvy)
Guinea pigs cannot synthesize their own Vitamin C, so deficiency is uniquely common. Without adequate Vitamin C, connective tissue breaks down.
- Signs: Swollen joints, reluctance to move, rough coat, dental problems, weight loss, dull eyes
- Cause: Diet lacking in Vitamin C sources (bell pepper is the best); using water-supplemented Vitamin C that has degraded
- Treatment: Increase fresh Vitamin C-rich vegetables immediately; vet may prescribe oral Vitamin C supplements
- Prevention: Daily fresh bell pepper, leafy greens; do NOT use Vitamin C in water (degrades rapidly)
Respiratory Infections (URI)
Upper respiratory infections are one of the most common guinea pig illnesses, often caused by bacteria (Bordetella, Streptococcus).
- Signs: Sneezing, nasal discharge, watery eyes, labored breathing, lethargy, weight loss
- Triggers: Stress, contact with a new guinea pig, poor ventilation, drafts
- Treatment: Antibiotics from an exotic vet; do not use over-the-counter treatments
- Quarantine: Isolate sick guinea pigs from others immediately — URI spreads between pigs
Dental Disease (Malocclusion)
Guinea pig teeth grow continuously. If they don't wear evenly (usually from insufficient hay), they can overgrow and misalign, making eating painful or impossible.
- Signs: Drooling, dropping food, weight loss, preference for soft foods, pawing at mouth
- Treatment: Tooth filing/trimming under anesthesia by an exotic vet
- Prevention: Unlimited hay — the main cause is insufficient hay chewing
Urinary Stones (Urolithiasis)
Calcium crystals or stones can form in the bladder, causing pain and obstruction — a serious emergency.
- Signs: Blood in urine (pink or red urine), crying when urinating, hunched posture, straining to urinate
- Risk factors: High-calcium diet (too much parsley, spinach, kale), not enough water
- Treatment: X-ray to confirm; small crystals may pass with fluids; stones may require surgery
- Prevention: Reduce high-oxalate greens, ensure constant fresh water access
Mites and Fungal Infections (Ringworm)
- Mites signs: Intense scratching, hair loss, crusty skin, frantic scratching ("Ivermectin Itch")
- Ringworm signs: Circular patches of hair loss, usually starting on face and spreading. Note: ringworm is a fungal infection, not a worm, and IS transferable to humans.
- Treatment: Mites — Ivermectin (vet-prescribed). Ringworm — antifungal cream (miconazole) and treating the environment.
Daily Health Monitoring
- ✅ Eating and drinking normally
- ✅ Normal droppings (plentiful, dark brown, well-formed)
- ✅ Active and alert; "wheeks" (excited vocalizations) when hearing food prep
- ✅ Clean eyes and nose (no discharge)
- ✅ Normal weight (weigh weekly; loss of >50g warrants vet visit)
- ✅ Normal coat (smooth, no bald patches)