Peppers are the convenient answer to guinea pig vitamin C, which makes a pig who refuses them feel like a dead end. It is not. Peppers are simply one rich source among several, and the real task is building a small rotation of accepted foods that delivers vitamin C steadily, every day, from things this particular pig will actually eat. Because a guinea pig's body cannot produce this vitamin itself, skipping the problem and hoping the rest of the diet covers it is not an option.
Sources Beyond Peppers Worth Trying
Work through other vitamin C containing vegetables and herbs in small amounts, one at a time. Leafy greens such as kale and spring greens, herbs like coriander and parsley, broccoli in modest portions, and other suitable vegetables all contribute, and pigs who reject one texture often accept another. Fresh grass, picked from a safe unsprayed area and offered clean, is a natural source many pigs take eagerly when vegetables fail, and it fits alongside the hay based diet rather than replacing it.
Introduce each new food gradually over several days, starting with a small piece and watching droppings, appetite, and enthusiasm. A food refused on day one is sometimes accepted on day four, so reoffer promising foods a few times before removing them from the list. Keep a simple note of what was offered, what was eaten, and what was left, because memory flatters picky pigs into looking fussier, or less fussy, than they are. Serve vegetables fresh, remove wilted leftovers, and vary the rotation so no single food carries the whole burden.
Freshness, Pellets, and Why Water Additives Disappoint
Vitamin C degrades with time, light, heat, and air. That single fact shapes the practical rules: buy pellets in quantities your pig will finish reasonably promptly, store them sealed in a cool dark place, check the milling or expiry information rather than feeding from an old open bag for months, and treat very old pellets as unreliable for vitamin C however complete they once were. Fresh vegetables should be bought little and often rather than stored until they wilt.
Adding vitamin C to drinking water sounds simple and is unreliable in practice. It degrades in the bottle, can change the taste enough to reduce drinking, and gives you no way to know what dose the pig actually took. Fresh food sources, eaten willingly, are a far more dependable route. If a pig refuses nearly everything rich in vitamin C despite patient trials, that is a veterinary conversation, not a reason to guess at supplement products or amounts on your own.
Watching for Deficiency and Involving the Vet
Possible signs that vitamin C shortage may be part of a problem include a rough coat, reluctance to move, sore or stiff joints, slow healing, reduced appetite, and general dullness. None of these proves deficiency on its own, since each can have other causes, and that is exactly why they belong in front of a veterinarian rather than being treated at home by assumption. Bring your feeding notes, including what this pig refuses, so the vet sees the real picture quickly.
Keep hay available at all times throughout, because the vitamin C work sits on top of the normal diet, not instead of it, and keep fresh water plain and plentiful. Steady daily intake from several accepted foods is the goal, rather than occasional large portions. Helpers can keep that consistency using KinsLe, where Care Teams shows which foods were offered and eaten, with each completed feeding marked by a time stamp.