How long do guinea pigs live? Lifespan and life stages

How long do guinea pigs live?

Most pet guinea pigs live 5 to 8 years. Good sources give slightly different ranges, because they are all averages of real pets with very different lives:

We'd plan for 5 to 8 years. That is the range most sources overlap on, and it is long enough to matter: a guinea pig bought for a 10-year-old may still be there when they leave school. Plan who will care for them through house moves, holidays and new babies before you bring them home.

How many years do guinea pigs live compared with other small pets?

Guinea pigs live much longer than most small rodents. A hamster or a rat is old at 2 to 3 years; a guinea pig at that age is in its prime. That is one reason they suit families who want a pet to grow up with, and one reason not to get them on a whim. If you are still choosing, our guide to guinea pigs as pets covers what those years involve day to day.

Guinea pig life stages

PetMD splits a guinea pig's life into four stages. Knowing which one yours is in tells you what to feed and what to watch for.

How long do guinea pigs live in captivity compared with the wild?

There is no wild pet guinea pig to compare with. The MSD Vet Manual explains that the domestic guinea pig, Cavia porcellus, does not exist in the wild. Its wild relatives live on the grassy plains of South America. So "in captivity" simply means as a pet, and the 5 to 8 years above is the figure to use. Pets in a good home are protected from the predators, cold and hunger that shorten life for any wild prey animal.

Does breed affect how long a guinea pig lives?

A little, according to PetMD, which gives hairless guinea pigs about 7 to 8 years on average and long-haired guinea pigs about 4 years. We'd read the long-haired figure as a warning rather than a fixed limit: long coats mat easily and trap dirt and urine around the rear, which the RSPCA links to flystrike, a condition that is often fatal. Daily grooming removes most of that risk. Our guinea pig breeds guide covers each coat type and the care it needs.

What shortens a guinea pig's life?

PetMD says poor husbandry (the everyday care and setup) is the most common cause of illness in guinea pigs. Almost everything on this list can be prevented at home:

• Not enough hay, which leads to dental and gut disease (RSPCA)
• Too little vitamin C, which guinea pigs cannot make themselves (RSPCA, Purdue)
• Being kept alone: the RSPCA says lonely guinea pigs may suffer, and stressed guinea pigs are more likely to fall ill
• Heat: Purdue warns heat stroke can kill within minutes above about 27°C (80°F)
• Wire floors, which PetMD links to bumblefoot (sore, infected feet)
• Dirty bedding and urine staining, which attract flies in warm weather (RSPCA)
• Pregnancy: PetMD notes breeding females can have shorter lives
• Illness that goes unnoticed, because guinea pigs hide pain (RSPCA)

How to help your guinea pig live longer

There is no guaranteed way to add years, as PetMD puts it, but healthy guinea pigs live longer, and a few daily habits do most of the work.

1. Hay all day. Good grass hay should be most of the diet and always available (RSPCA). Chewing it wears down teeth that grow for life. Our guinea pig diet guide gives the daily amounts.
2. Vitamin C every day. Feed fresh guinea pig pellets and vitamin C rich vegetables such as peppers and parsley. Pellets lose vitamin C once opened, so buy small bags. See vitamin C for guinea pigs.
3. Keep them in pairs. Two females, brothers raised together, or a neutered male with females are the easiest pairs (RSPCA). Our guide to guinea pig pairs explains how to match them.
4. Give them room and a cool spot. At least 0.7 m² (7.5 sq ft) for two, and preferably 1 m² (10.5 sq ft), says Humane World for Animals. Keep them at 18 to 24°C (65 to 75°F), the range the MSD Vet Manual gives.
5. Check them daily, weigh them weekly. Look at eating, droppings, eyes, nose and rear end every day, and teeth and nails every week (RSPCA).
6. See a vet at least once a year. The RSPCA and PetMD both advise a yearly check, and more often for seniors. Find a vet who sees guinea pigs often before you need one.

Caring for an older guinea pig

From about 4 years, PetMD suggests more frequent vet checks. In practice that means watching a few things more closely:

• Weight, weekly: older guinea pigs can lose weight quietly if their teeth are sore
• Teeth: front teeth weekly, and see a vet if they eat less or drop food
• Rear end: older and heavier guinea pigs may struggle to keep clean, which PetMD lists as a reason to see a vet
• Nails and feet: shorter, softer floors and thick bedding are kinder to older joints
• Ramps: lower, wider ramps and no high levels
• Warmth: keep them out of draughts, especially in winter

Many older guinea pigs stay chatty and greedy right to the end. If yours is in the last stage of life, your vet can help you judge how comfortable they are and when it is kinder to let them go. Our guinea pig health guide covers the signs of illness to watch for at any age, and our complete guinea pig care guide brings every topic together.