Guinea Pig

The guinea pig (Cavia porcellus) is a small domesticated rodent in the family Caviidae. Adults weigh 700 to 1,200 grams and measure 20 to 30 cm long. They are compact and rounded, carry no tail, and have short legs, wide bright eyes, and medium-sized ears. Coat colours and textures vary by variety. With proper care, a guinea pig typically lives five to seven years.

Also called a cavy, the guinea pig is neither a pig nor from Guinea. It comes from the Andean highlands of South America and has no relation to pigs. The name traces back to early European trade routes, though its exact origin is still debated.

In the Philippines, guinea pigs have grown from a curiosity into a genuine urban pet trend, particularly within Metro Manila and other highly urbanised areas. They are sold at Cartimar in Pasay (Metro Manila's well-known pet hub), through Facebook Marketplace, OLX Philippines, and at select pet shops in SM and Robinsons mall pet sections. Prices range from roughly P300 to P1,500 per animal depending on coat variety and source. Monthly costs for a pair of guinea pigs run approximately P600 to P1,500 for hay, pellets, and fresh produce.

Unlike dogs and cats, which are common pets across both urban and rural Philippines, guinea pigs remain primarily an urban pet trend. They are more common in city apartments than in provincial settings.

Scientific classification: Cavia porcellus, family Caviidae, order Rodentia. Lifespan five to seven years. Care level moderate.

Guinea pigs are not categorised by breed in the same way as dogs and cats. The key differences between types lie in coat length, texture, and pattern. At Cartimar and through Philippine online sellers, the most commonly encountered varieties are the American (also called English), the Teddy, the Abyssinian, and occasionally the Peruvian. Skinny Pigs (nearly hairless guinea pigs) appear from time to time through specialty sellers.

For first-time owners in the Philippines, the American or Teddy variety is the most practical starting point. Their short coats require minimal grooming and are better suited to the Philippine tropical climate than the long-haired Peruvian, which needs daily brushing and is more vulnerable to overheating.

Guinea pigs were domesticated by the indigenous peoples of the Andes, in the area that is now Peru, Bolivia, and Ecuador, at least 3,000 years ago and possibly much longer. Archaeological evidence from highland South American sites shows they were kept for food and used in religious ceremonies by Inca and pre-Inca civilisations. The domestic guinea pig descends from the wild cavy (Cavia aperea).

Spanish and Dutch traders brought guinea pigs to Europe in the 16th century. They were quickly adopted as fashionable pets among European families and appeared at royal courts. Selective breeding for different coat colours, lengths, and patterns developed over the 18th and 19th centuries.

In the Philippines, guinea pigs arrived as an exotic novelty and became genuinely popular companions from the 2000s onward, growing alongside social media communities that share care information and connect buyers with sellers. The Facebook group Guinea Pig Philippines is among the most active domestic guinea pig communities in Southeast Asia, with members sharing husbandry advice, vet recommendations, and adoption postings regularly.

Guinea pigs have stocky, rounded bodies, a proportionally large head, wide-set eyes, medium-sized ears, four short legs, and no tail. Males (boars) tend to be larger and heavier than females (sows). Four toes on the front feet and three on the back feet are a consistent trait across all varieties.

Coat colours range from pure white and solid black to cream, orange, chocolate, golden, and many combinations. Common patterns include solid, bicolour, tricolour, tortoiseshell, Dutch (a white base with a coloured patch), and roan. Eye colour is typically dark brown, with red or pink eyes occurring in some white-coated animals.

Guinea pig teeth grow continuously throughout their lives. Regular access to unlimited hay is what keeps the teeth at the correct length through natural chewing. Guinea pigs that lack sufficient hay develop dental problems that prevent eating and can become serious quickly.

Guinea pigs are herd animals by nature. In the wild, cavies live in family groups with clear social bonds. In captivity, a guinea pig kept alone is a lonely animal that may eat and interact less, vocalise less, and develop stress-related health problems over time. Keeping a minimum of two guinea pigs together is a welfare requirement, not simply a preference.

Communication through sound is one of the most distinctive features of guinea pig behaviour. The wheek is a high-pitched squeal that announces excitement: food is coming, a familiar person has appeared, or the vegetable bag is rustling. It is loud enough to hear across a room and is the sound most associated with guinea pigs. A purr indicates contentment, often heard during calm handling. Teeth chattering signals displeasure or warning. A low rumbling sound paired with a slow side-to-side walk (rumblestrutting) is how guinea pigs assert social rank.

Popcorning is a behaviour that many new owners find surprising: a sudden leap and twist in the air, sometimes repeated rapidly. It expresses happiness and is seen most often in young animals after receiving a favourite treat or exploring a new space. Adults do it too. It is a reliable sign that a guinea pig is feeling good.

Guinea pigs are diurnal, meaning they are active during daylight hours and rest more at night. They adapt well to household routines and learn to anticipate feeding times.

Daily care in the Philippines follows the same fundamentals as anywhere: fresh hay at all times, fresh water changed daily, vitamin C vegetables offered once or twice a day, and a daily spot-clean of the enclosure removing soiled bedding and droppings. Full bedding changes should happen two to three times per week.

The Philippine climate presents two distinct challenges. The first is year-round tropical heat. Temperatures of 28 to 35 degrees Celsius are typical throughout the country, and during the dry season (roughly March to May) they can reach 38 degrees or more. Guinea pigs are comfortable between 18 and 24 degrees Celsius. Above 28 degrees they become heat-stressed; above 32 degrees heat stroke is a real risk. Air conditioning in the enclosure room during the hottest hours of the day provides the safest protection. Where AC is not possible, position the cage in the most ventilated part of the home, use a fan for airflow (not directed straight at the cage), and place frozen water bottles wrapped in a damp cloth inside the enclosure for the guinea pigs to press against.

The second challenge is the rainy season, which runs roughly from June to November. High humidity, poor ventilation, and damp bedding create conditions where bacteria and mould grow rapidly. Increase bedding change frequency during the rainy months. Ensure the enclosure is not near leaking windows or poorly ventilated rooms. Damp bedding left in place causes foot infections, respiratory problems, and other health issues.

Timothy hay (or orchard grass hay) is the dietary foundation and must be available at all times. It keeps digestion running, prevents weight gain, and provides the constant chewing that wears down continuously-growing teeth. A guinea pig without hay for even a few hours risks gut stasis.

Fresh vegetables must be offered daily because guinea pigs cannot produce vitamin C internally. Every individual must have a reliable daily source of the vitamin, or scurvy will develop within weeks: swollen joints, rough fur, lethargy, and loss of appetite. Bell pepper is an excellent vitamin C source and is widely available in Philippine markets and grocery stores. One Philippine food that is both locally available and genuinely suitable for guinea pigs is kamote (sweet potato) tops and leaves. Kamote leaves are safe, vitamin C-rich, and inexpensive. Many Philippine guinea pig owners offer them as a regular vegetable alongside bell pepper. The sweet potato root itself should be given in very small amounts only, as it is high in sugar and starch.

Use guinea pig pellets rather than rabbit pellets. Rabbit pellets lack the vitamin C that guinea pig formulas include. Offer pellets in a small measured amount once a day.

Guinea pigs are prey animals that instinctively conceal signs of illness. By the time a guinea pig looks obviously unwell, the condition has often progressed. Regular weight checks, daily observation of eating habits and droppings, and attention to any change in behaviour are the most reliable early warning tools.

The Philippine Animal Welfare Act (Republic Act 8485, amended by RA 10631) sets minimum standards for animal care and prohibits cruelty to animals including small pets. Responsible guinea pig ownership in the Philippines includes providing adequate space, food, water, and veterinary care when needed.

Access to exotic pet veterinary care in the Philippines is primarily concentrated in Metro Manila, Cebu City, and a small number of other major urban centres. The Facebook Guinea Pig Philippines community is a practical resource for finding vets with guinea pig experience in your area.

Most commercially sold pet cages in the Philippines are too small for guinea pigs. The minimum recommended floor area for two animals is 0.7 square metres, roughly 120 cm by 60 cm, and larger is always better. C and C cages (modular cube grids with a corrugated plastic base) are popular among dedicated Philippine guinea pig keepers because they can be sized to suit apartment living, are relatively affordable, and are easy to clean. The corrugated plastic (coroplast) base can usually be sourced from signage shops.

Bedding must be absorbent and dry. Fleece liners are widely used by Philippine guinea pig owners because they are washable, reusable, and cost-effective over time. Paper-based bedding is also good if available. Avoid cedar or pine shavings, which release chemicals harmful to guinea pig lungs.

Placement matters in the Philippine context. Position the enclosure away from direct sunlight through windows, cooking fumes from the kitchen, and any source of incense or strong chemical smells. During the rainy season, avoid placing cages near leaking windows or in poorly ventilated rooms. Guinea pig respiratory systems are sensitive.

The guinea pig gestation period is 59 to 72 days. This is long for a small rodent, and the result is pups born fully furred with their eyes open, able to move and eat solid food within hours of birth. This is called precocial development. Litter size is usually one to four pups, most often two or three.

Female guinea pigs can reach sexual maturity at just four to six weeks of age. This surprises many first-time owners. A male pup still living with his mother or sisters at four weeks can father a litter. Sexing and separating males from females by four weeks is essential.

In female guinea pigs, the pelvic bones begin to fuse after roughly six months. A sow that has never given birth and first breeds after this point faces a significantly higher risk of difficult labour. This is a consideration for owners who do intend to breed responsibly.

For most Philippine pet owners, the most practical path is to keep same-sex pairs and avoid breeding. The guinea pig population in the Philippines has no shortage of animals needing homes.

The most well-known physical location to buy guinea pigs in the Philippines is Cartimar in Pasay City, Metro Manila, where multiple pet stalls sell a range of animals and supplies. Outside Metro Manila, pet sections in SM and Robinsons malls carry guinea pigs in some branches. Facebook Marketplace and OLX Philippines are active online sources, with private breeders and sellers posting regularly. The Facebook group Guinea Pig Philippines is a good community resource for connecting with reputable sellers and for getting recommendations from experienced owners.

When selecting animals, check for clear, bright eyes with no discharge. The coat should be clean, smooth, and free from bare patches or signs of excessive scratching. The animal should be alert and mobile, not huddled or withdrawn. Listen for quiet, even breathing with no wheezing or clicking sounds. Offer a piece of bell pepper or a leaf of kamote tops; a healthy guinea pig will show immediate interest.

Always purchase a minimum of two animals. Guinea pigs are herd animals and a single animal will not thrive socially or emotionally regardless of human interaction. Two animals from the same source brought home at the same time is the smoothest introduction.