Guinea Pigs: Fit for a Queen

Everything You Need to Know About Raising Little Cavies

Queen Elizabeth I was a fan, and so are we. Not only do guinea pigs have a fascinating history, they also have serious staying power and plenty of main character energy. Once considered exotic companions fit for royalty, they've since become one of America's most popular "pocket pets," living in roughly 1.5 million U.S. households. That makes them the second most popular small animal pet in the country, just behind rabbits.

Despite their name, guinea pigs are not from Guinea, and they are not pigs. They're actually members of the rodent family, with their own unique personalities, dietary requirements, and care needs.

If you're thinking about welcoming a guinea pig (or two!) into your home, here's what you should know about these charming little companions.

What Do Guinea Pigs Eat?

Hay All Day

If there's one thing to remember about feeding guinea pigs, it's that hay is not just a treat. It's an essential part of their everyday diet. High-quality grass hay such as Timothy hay should be available at all times. It provides the fiber guinea pigs need for healthy digestion and helps wear down their continuously growing teeth.

Like all rodents, guinea pigs have incisors that never stop growing. In fact, they have 20 teeth in total, all of which continue to grow throughout their lives. Constant chewing on fibrous foods helps keep their teeth at a healthy length and prevent painful dental problems.

Fresh Vegetables and Vitamin C

Hay isn't the whole story. Guinea pigs also need a daily serving of fresh vegetables, particularly those rich in vitamin C.

Some good options include:

• Bell peppers (an especially good source of vitamin C)
• Romaine and red-leaf lettuce
• Cilantro and parsley
• Kale and other leafy greens

Fruit can be offered occasionally as a treat, but keep portions small because of its sugar content.

Guinea Pig-Specific Pellets

A small, measured serving of high-quality guinea pig pellets can help round out their diet. Look for a product formulated specifically for guinea pigs, ideally with a Timothy hay base and added vitamin C.

One important tip: vitamin C can break down over time, particularly when exposed to heat, light, and moisture. Check the manufacturing and expiration dates on your pellets, and store them according to the manufacturer's recommendations.

Fresh water should also be available at all times.

Life with Guinea Pigs: Habitat, Social Needs and Personality

Guinea pigs may be small, but they have big personalities and some specific needs when it comes to their living arrangements.

Guinea Pigs Need Companionship

Guinea pigs are naturally social animals and generally do best with another compatible guinea pig. They communicate with one another through a varied vocabulary of whistles, squeaks, purrs, and chirps.

They also have a delightful way of expressing happiness called popcorning. When excited, a guinea pig may suddenly leap into the air, twist its body, and bounce around like a piece of popcorn popping. It's impossible not to smile when you see it.

Guinea Pig Habitat and Bedding

A comfortable guinea pig habitat needs plenty of room to move around, a solid floor, soft, appropriate bedding, and places to hide. We recommend a hemp mat for the base, and loose hemp bedding for deep substrate and burrowing. Guinea pigs are prey animals by nature, so having somewhere to retreat when they feel nervous is important, and hemp is an all-natural, highly absorbent, safe, and environmentally friendly choice.

Enrichment and Exercise

They also benefit from tunnels, chew toys, and other enrichment activities that encourage natural behaviors.

Unlike some small pets, guinea pigs don't climb or jump particularly well, so floor space is more important than vertical levels. Keep their enclosure in a well-ventilated area away from drafts, direct sunlight, and extreme temperatures.

A Few Words About Breeding

Guinea pigs reproduce quickly, so responsible ownership means keeping males and females separated unless breeding is intentional and carefully managed.

Females, known as sows, can reach sexual maturity at a very young age, sometimes as early as four weeks. Males are called boars, and babies are known as pups. Pregnancy typically lasts around 59 to 72 days, and litters commonly contain two to four pups. Because guinea pigs can become pregnant again shortly after giving birth, accidental breeding can quickly lead to more guinea pigs than you bargained for.

Guinea Pigs Are Not Rabbits (And Their Care Is Different!)

At first glance, guinea pigs and rabbits might seem like close cousins. Both are small, furry herbivores that love hay, enjoy leafy greens, and make popular household pets.

But don't let the similarities fool you. Guinea pigs belong to the rodent family (Caviidae), while rabbits belong to the order Lagomorpha. They have different biological needs, and one of the most important differences is their nutritional requirements.

For starters, guinea pigs cannot produce their own vitamin C. Just like humans, they must get this essential nutrient through their diet. Without enough vitamin C, they can develop scurvy, a serious condition that can cause weakness, joint problems, and other health complications.

This means guinea pigs need a diet specifically formulated for their needs. Rabbit pellets, for example, are not an appropriate substitute for guinea pig food because they don't provide the vitamin C guinea pigs require.

There are a few other interesting differences, too. Guinea pigs are born remarkably well-developed, with fur, open eyes, and the ability to move around shortly after birth. This is known as being precocial, a characteristic they share with animals such as porcupines (and chickens!). Baby rabbits, by contrast, are born much less developed.

A Little Guinea Pig History: From the Andes to the Royal Court

Long before they became beloved household pets, guinea pigs called the Andes Mountains of South America home. Their wild ancestors, Cavia tschudii, lived across the region, including parts of modern-day Peru, Bolivia, Ecuador, and neighboring countries.

Guinea pigs have been domesticated for thousands of years. Indigenous communities in the Andes raised them as a food source and incorporated them into cultural and ceremonial practices. The Incas, for example, used guinea pigs in religious ceremonies and offerings.

By the 16th century, Spanish explorers and traders had introduced guinea pigs to Europe, where they quickly became fashionable pets among wealthy households and royal courts, most notably Queen Elizabeth I of England.

What's in a Name?

So, where did the name guinea pig come from? There are a few theories.

One explanation is that guinea pigs were sold in 16th-century England for approximately one guinea, a gold coin worth one pound and one shilling. And their distinctive squeaks and grunts, combined with their round bodies and short legs, may have reminded people of miniature pigs.

Their scientific name, Cavia porcellus, offers another clue. The Latin word porcellus translates to "little pig." Whatever the explanation, we can all agree these “little pigs” are adorable.

Choose Your Own Adventure: Popular Guinea Pig Breeds

You might be surprised to learn just how many different kinds of guinea pigs there are. From sleek, short-haired varieties to wild-looking curls and hairless breeds, there's quite a bit of variety in the cavy world.

Here are some of the most popular varieties:

Short-Haired Guinea Pigs

• American: One of the most common pet guinea pigs, the American has a smooth, short, straight coat that's relatively easy to maintain.
• Abyssinian: One of the most recognizable varieties, the Abyssinian has a rough, tousled coat featuring multiple swirling rosettes (whorls) across its body.
• White Crested: Similar to the American, but with a distinctive rosette, or "cowlick," on top of its head. The crest may be white or match the color of its coat.
• Teddy: With a dense, short, upright coat, the Teddy has a plush appearance and a texture reminiscent of a stuffed animal.
• Rex: Known for its short, coarse, woolly coat and distinctive texture.

Long-Haired Guinea Pigs

• Peruvian: Famous for its long, flowing hair, which can grow past its body and requires regular brushing and trimming to prevent tangles and matting.
• Silkie (Sheltie): Has long, silky hair that sweeps backward from the face, giving it an especially elegant appearance.
• Coronet: Combines a long, smooth coat with a distinctive single crest on its forehead.
• Texel: Features a full-body coat of tight, springy curls.
• Merino and Alpaca: Both have distinctive long, wavy or curly coats, sometimes accompanied by a rosette on the head.

Hairless Guinea Pigs

• Skinny Pig: Mostly hairless, with small patches of fuzzy hair around the nose and feet. These guinea pigs need extra attention to temperature regulation and skin care.
• Baldwin: Completely hairless as an adult. Baldwin guinea pigs are born with a coat that they gradually lose as they mature.

Whether you prefer the low-maintenance coat of an American or the dramatic curls of a Texel, there's a guinea pig variety for everyone. Just remember that long-haired and hairless varieties may require additional grooming or specialized care.

Fit for a Queen (and You!)

There's a reason guinea pigs have charmed people for centuries. They're social, expressive, endlessly entertaining, and full of personality. From their enthusiastic dinner-time squeaks to their joyful popcorn jumps, they have a way of making themselves part of the family.

They're also wonderful little reminders that responsible pet ownership means understanding what makes each animal unique. With the right diet, a comfortable habitat, companionship, and plenty of love, guinea pigs can make delightful pets.