Many small mammals handle vitamin C quietly in the background, making what they need inside their own bodies and asking nothing special of their diet. Guinea pigs are the exception, and scurvy is the name for what happens when that exception is ignored. Their bodies lack the ability to produce vitamin C themselves, so all of it must come from food, every day, for the animal's whole life. Miss that supply often enough, or let it thin out without noticing, and a deficiency that no guinea pig can compensate for begins to build.
A Nutrient That Must Arrive in Food
Vitamin C supports tissue maintenance throughout the body, including the connective tissue that holds joints together, the gums, the skin, and the processes involved in healing and immune function. An animal that synthesizes its own supply carries a reserve of control over all of that. A guinea pig carries none, which is why its requirement is daily rather than occasional: each day's food is that day's supply, and a pattern of mostly hay and good intentions is not enough unless a vitamin C source is deliberately part of the pattern. Hay remains the foundation of the diet, but hay alone does not meet this particular need.
What Deficiency Can Do Over Time
Scurvy develops gradually, and its possible signs reflect the tissues vitamin C supports. A pig becoming deficient may move stiffly or reluctantly, as if its joints are sore, lose enthusiasm for food, develop a rough coat, show sore or bleeding gums, heal slowly from small wounds, or seem generally dull and less interested in its surroundings. None of those signs proves scurvy on its own, since each can also appear with dental trouble, arthritis, infection, or other conditions, and telling them apart is a vet's work. What an owner can do is recognize the pattern as a reason to book a prompt vet visit and to describe the pig's diet honestly and in detail at that visit, because the feeding history is a central clue the vet will ask about.
Waiting to see whether a stiff, off-food pig improves on its own is a poor plan, since a guinea pig that eats less also risks gut slowdown on top of whatever began the problem.
Daily Sources That Reliably Deliver Vitamin C
Build the supply from two directions. Fresh vegetables rich in vitamin C, offered daily, do the heavy lifting: bell peppers are a strong everyday choice, and leafy greens and suitable herbs add variety across the week. Alongside them, a fortified staple food made for guinea pigs contributes vitamin C as part of the measured daily portion, and the two sources together protect against either one having a thin day.
Freshness matters more than owners expect. Vitamin C fades in cut vegetables left sitting and in staple food stored open for a long stretch, so buy vegetables in quantities the pig will eat while fresh, store the staple sealed and replace it as directed on its packaging rather than working through an old bag for months, and serve the vitamin C foods as part of the main daily feeding instead of as an afterthought.
Keeping the Source in Every Day's Feeding
The common failure is not ignorance but drift: one person assumes another gave the vegetables, a busy day reduces feeding to hay and a refill, or the pig's favorite green runs out and nobody replaces it for several days. A named daily feeding arrangement, where the person feeding that day knows the vitamin C source is part of their task every single time, closes those gaps. Review the arrangement when anything changes, a new household member helping, a holiday cover arrangement, or a pig moving to a different feeding spot, so the daily source survives the change.
KinsLe helps every feeder follow the same plan, with each person's Care Teams assignment naming who provides the fresh vegetables and fortified staple that day.