Quick answer
Guinea Pigs feed on hay, fresh vegetables, and guinea-pig pellets with vitamin C, adjusting with season, age, and what is abundant in Domestic worldwide; wild cavies in South America. That label is a preferred pattern, not every item an individual might sample.
Key takeaway
Guinea Pigs feed on hay, fresh vegetables, and guinea-pig pellets with vitamin C, adjusting with season, age, and what is abundant in Domestic worldwide; wild cavies in South America. That label is a preferred pattern, not every item an individual might sample.
Guinea Pig diet overview
Guinea Pigs (Cavia porcellus) are best summarised as Herbivore — hay, fresh vegetables, and guinea-pig pellets with vitamin C. Anatomy and habitat (Domestic worldwide; wild cavies in South America) decide whether they hunt, graze, filter, scavenge, or mix strategies across the year.
How guinea pigs find food
Energy-rich foods are prioritised when available; lean seasons force broader diets or longer travel. Young animals may eat different items or receive food from parents.
Guinea Pig role in the food web
As herbivores shaping plants and seeds, guinea pigs move nutrients and influence prey or vegetation.
Feeding and human conflict
Never feed wild guinea pigs. Habituation raises injury risk and can lead to lethal management. Captive diets must match species needs, not generic pet food rules.
Diet and scurvy risk
Like humans, guinea pigs cannot synthesise vitamin C and need daily fresh vegetables such as bell pepper and leafy greens alongside unlimited timothy hay and fortified pellets. Teeth grow continuously and are worn down by chewing hay and fibrous food. Without vitamin C they develop scurvy, which is fatal if untreated.
Sources
Guinea Pig FAQs
What do guinea pigs eat?
Guinea Pigs feed on hay, fresh vegetables, and guinea-pig pellets with vitamin C, adjusting with season, age, and what is abundant in Domestic worldwide; wild cavies in South America. That label is a preferred pattern, not every item an individual might sample.
What is the scientific name of the guinea pig?
Cavia porcellus — used in research and conservation listings for guinea pigs.
Where do guinea pigs live?
They are associated with Domestic worldwide; wild cavies in South America. Local presence depends on food, cover, and human land use.
What is the conservation status of guinea pigs?
Listed in our guides as Domesticated. Check the IUCN Red List and national assessments for the latest formal category.
Social herd animals
Guinea pigs evolved as prey animals living in groups and should never be kept alone — a solitary guinea pig becomes lonely and stressed. Same-sex pairs or small groups work well, with careful introductions. They communicate through wheeking (food excitement), purring, chutting, and rumble-strutting during dominance displays.