Guinea pigs are friendly, social pets that make wonderful companions when provided with proper housing, nutrition, and veterinary care. Understanding their unique needs is essential for maintaining their long-term health and wellbeing.
Guinea Pig Facts
- Native to the Andes Mountains of South America.
- Guinea pigs are social animals and rarely bite.
- Average lifespan is 5–6 years.
- Their teeth grow continuously throughout life and require constant chewing of hay to remain properly worn.
- Males reach sexual maturity at approximately 3 months of age.
- Females reach sexual maturity at approximately 2 months of age.
- Gestation lasts approximately 59–72 days.
- Babies are born fully furred with their eyes open.
- Adult males typically weigh 900–1,200 grams.
- Adult females generally weigh 700–900 grams.
Housing
The larger the enclosure, the better.
A guinea pig enclosure should provide enough room for:
- Feeding stations
- Hide boxes
- Toys
- Exercise and normal movement
Guinea pig urine contains high levels of ammonia, which may irritate the respiratory system. Adequate space allows them to move away from soiled areas.
Recommended housing includes:
- Solid-bottom cages
- Wire sides for ventilation
- Several inches of Carefresh® paper bedding
Maintain enclosure temperatures between:
65–79°F
The enclosure should be thoroughly cleaned and bedding replaced 2–3 times each week.
Avoid:
- Cedar shavings
- Pine shavings
These aromatic wood products contain resins that may irritate the skin and respiratory system.
Never place the enclosure:
- In direct sunlight
- In drafty locations
For supervised playtime, a toddler pool filled with Oxbow oat hay provides an enriching environment where guinea pigs can naturally burrow, wheek, and explore.
Do not house intact males together, as they commonly compete and fight over territory and resources.
Diet
Provide unlimited Timothy hay at all times.
Hay supplies the long-stem fiber necessary for:
- Proper digestion
- Healthy intestinal function
- Normal tooth wear
Pellets are not part of a guinea pig’s natural diet.
If pellets are offered:
- Choose Timothy-based pellets.
- Limit to ¼ cup daily.
Vitamin C
Guinea pigs cannot produce their own Vitamin C and require 20–50 mg daily.
Vitamin C may be provided through:
- Oxbow Vitamin C supplements
- Children’s chewable Vitamin C tablets
Although Vitamin C water additives are available, they lose potency quickly and may discourage water consumption.
Offer fresh vegetables high in Vitamin C daily, including:
- Bell peppers
- Tomatoes
- Kiwi
- Oranges
Avoid vegetables and greens high in calcium or oxalates.
Foods to Avoid
Alfalfa hay and alfalfa-based pellets are not recommended because they contain excessive calcium and fat, which may contribute to disease.
Avoid:
- Sweet treats
- Excess fruit
- Seeds
These foods may contribute to obesity and digestive disorders.
Water
Provide fresh, clean water every day using a water bottle fitted with a sipper tube.
Average daily water intake ranges between:
100–150 mL (3–5 ounces)
Common Medical Problems
Obesity
Prevent obesity through:
- Proper nutrition
- Regular exercise
Dental Disease
Dental disease may include:
- Infection
- Overgrown teeth
- Sharp tooth points
Possible causes include:
- Improper diet
- Genetics
- Vitamin C deficiency
- Trauma
Signs may include:
- Poor appetite
- Drooling
- Teeth grinding
Providing unlimited hay and appropriate Vitamin C supplementation helps reduce the risk.
Abscesses
Skin abscesses may develop following injuries from enclosure furnishings or cage mates.
These often appear as round swellings beneath the skin and typically require surgical treatment.
Gastrointestinal Stasis
Reduced movement of food through the digestive tract is a medical emergency.
Signs include:
- Reduced appetite
- Decreased fecal production
- Hunched posture
- Abdominal enlargement
- Lethargy
Prompt veterinary care is recommended.
Diarrhea
Possible causes include:
- Bacterial infections
- Fungal infections
- Parasitic infections
Untreated diarrhea may result in:
- Dehydration
- Weight loss
- Electrolyte imbalances
Heat Stroke
Guinea pigs are highly susceptible to overheating.
Signs include:
- Hot environmental conditions
- Excessive salivation
- Shallow breathing
- Lethargy
Heat stroke requires immediate veterinary attention.
Bladder Stones
Bladder stones may cause:
- Pain
- Infection
- Difficulty urinating
- Urinary obstruction
Signs include:
- Painful urination
- Difficulty urinating
- Changes in urine color
- Reduced appetite
- Lethargy
An inability to urinate is considered an emergency.
Preventive care includes:
- Proper diet
- Adequate water intake
- Avoiding foods high in calcium or oxalates
Ovarian Cysts
Signs may include:
- Hair loss
- Enlarged abdomen
- Lethargy
- Hunched posture
- Reduced appetite
Spaying female guinea pigs helps prevent ovarian cysts.
Mites
Mites are among the most common skin conditions affecting guinea pigs.
Signs include:
- Severe itching
- Crusting of the skin
- Redness
Severe itching may resemble seizure-like activity.
Breeding Considerations
If breeding is planned, females should have their first litter before 6 months of age.
After this age, the pelvic canal may become too narrow for natural delivery, increasing the likelihood of requiring a cesarean section.
Preventive Veterinary Care
Physical examinations are recommended every 12 months.
Routine spaying or neutering is recommended for guinea pigs when appropriate.
