Guinea Pig Health Essentials
Vitamin C Content in Guinea Pig Foods
Comparison
| Condition | Early Sign | Urgency | Prevention |
|---|---|---|---|
| Scurvy | Rough coat, leg tenderness | Days | Daily vitamin C sources |
| Respiratory | Sneezing, nasal discharge | Hours | Clean bedding, no drafts |
| Dental Malocclusion | Drooling, weight loss | Weeks | Hay-based diet, chew toys |
| Bladder Stones | Straining, blood in urine | Days | Calcium moderation |
| Bumblefoot | Limping, foot swelling | Weeks | Solid flooring, clean cage |
Health Check Routine
Daily Health Monitoring Checklist
| Weigh guinea pig daily (digital kitchen scale) | |
| Check food bowl — are they eating normally? | |
| Monitor droppings — size, shape, quantity | |
| Listen for sneezing, wheezing, nasal noises | |
| Check eyes and nose for discharge | |
| Offer fresh vitamin-C veggies daily | |
| Replace water bottle vitamin C daily (degrades in 24h) | |
| Schedule exotic vet exam every 6 months |
Guinea pigs (Cavia porcellus) are prey animals that mask signs of illness until they are significantly compromised -- by the time a guinea pig appears obviously sick, it may have been ill for days. This is why recognizing subtle early signs, scheduling regular veterinary exams, and acting quickly on changes in behavior or appearance is so important. The conditions most likely to harm a guinea pig are largely preventable: vitamin C deficiency, dental disease, and respiratory infections can all be addressed with proper husbandry and diet.
Vitamin C Deficiency (Scurvy)
Guinea pigs, like humans, cannot synthesize vitamin C internally and must obtain it entirely through diet. Without adequate dietary vitamin C, guinea pigs develop scurvy within 1-2 weeks. Signs: rough coat, reluctance to move, tenderness when handled (especially legs -- bleeding into joints causes pain), swollen joints, slow-healing wounds, loose teeth, and diarrhea. Advanced cases develop internal hemorrhage.
Prevention is simple and reliable: fresh leafy greens and vegetables rich in vitamin C (bell pepper -- the highest available source at 120-190 mg/100g, kale, parsley, romaine lettuce) provided daily. Commercial guinea pig pellets are often supplemented with vitamin C, but vitamin C degrades rapidly with heat and light -- pellets stored for more than 90 days may have negligible vitamin C remaining despite label claims. Do not rely on pellets as the sole vitamin C source. Vitamin C tablets dissolved in water (25-50 mg/day) are an appropriate supplement, but water-soluble vitamin C degrades within 24 hours in a water bottle -- fresh solution daily.
Respiratory Infections
Bacterial respiratory infections (Bordetella bronchiseptica, Streptococcus pneumoniae) are the most common infectious disease in guinea pigs. Signs: nasal discharge, sneezing, labored breathing, audible crackling or wheezing, lethargy, and loss of appetite. Respiratory disease progresses quickly -- a guinea pig with mild signs in the morning can be in critical condition by evening. Any suspected respiratory infection requires same-day veterinary care; treatment with appropriate antibiotics (trimethoprim-sulfa, enrofloxacin) is effective when started early.
Important drug warnings: antibiotics that disrupt gram-positive gut flora are dangerous in guinea pigs. Amoxicillin, ampicillin, clindamycin, lincomycin, and erythromycin cause fatal enterotoxemia. Only use antibiotics prescribed specifically for guinea pigs by a veterinarian experienced with small mammals.
Dental Disease (Malocclusion)
Guinea pig teeth (incisors and cheek teeth) grow continuously throughout their lives. Molar malocclusion -- overgrown, misaligned cheek teeth -- causes pain, inability to chew, and progressive starvation. Signs are subtle initially: preference for soft foods, weight loss, drooling (hypersalivation), and pawing at the mouth. Diagnosis requires sedation for a complete oral exam; malocclusion often can't be seen without dental instruments. Treatment involves dental rasping under anesthesia to reestablish correct bite alignment -- requires a veterinarian with exotic small animal dental experience.
Prevention: unlimited grass hay (timothy, orchard grass) is the most important preventive factor -- the grinding motion and abrasiveness of hay wears teeth appropriately and stimulates proper alignment.
Urinary Tract Conditions
Bladder sludge and bladder stones are common in guinea pigs fed high-calcium diets (alfalfa hay, which should not be the primary hay for adults; it's appropriate only for pregnant/nursing females and juveniles under 6 months). Signs: straining to urinate, crying or vocalization during urination, blood in urine, hunched posture. Calcium oxalate and calcium carbonate stones require veterinary imaging (radiograph or ultrasound) and possibly surgical removal. Dietary management -- limiting calcium-rich foods, providing adequate water -- reduces recurrence.
Sources: Quesenberry and Carpenter "Ferrets, Rabbits, and Rodents" 3rd ed. guinea pig chapter; American Guinea Pig Society care guidelines; Dobson JM -- vitamin C deficiency in guinea pigs (BSAVA research); Merck Veterinary Manual guinea pig internal medicine section.