Preventing vitamin C deficiency in guinea pigs

Vitamin C deficiency — also called scurvy — is genuinely the most common preventable health problem in guinea pigs, and it's great that you're thinking about it before there's an issue rather than after. Guinea pigs can't synthesise their own vitamin C, so they rely entirely on what you give them. Before I point you toward the best approach, can you tell me: how are you currently feeding them — do they get fresh veg daily, or mostly pellets and hay? And are they eating well and active at the moment?

That's a really honest answer and it tells me exactly where the gap is. Hay is perfect — that should always be the bulk of their diet — but guinea pig pellets usually contain very little usable vitamin C, and it degrades quickly once a bag is opened. Three-month-old Coronets are growing fast and their needs are higher than adults right now. The single most reliable fix is a daily vitamin C supplement in their water or dropped directly onto their food. The one I'd recommend for your pair is Beaphar Vitamin C tablets for guinea pigs — they're widely trusted, easy to dose, and the tablets dissolve cleanly. One tablet per guinea pig per day in a small amount of water works well.

Yes, and here's why it matters beyond just vitamin C. Fresh veg provides hydration, mental stimulation, and a range of other nutrients the supplement doesn't cover. For two three-month-olds, aim for a small handful of fresh greens each per day. The safest high-vitamin-C options to start with are romaine lettuce, fresh parsley, and red or green bell pepper — bell pepper especially is packed with vitamin C and most guinea pigs go absolutely mad for it. Introduce new foods one at a time over a week or so, just to make sure their digestion adjusts without any loose stools.

The early warning signs are subtle but worth knowing. Look for reluctance to move around or a stiff, hunched gait — their joints are often the first thing affected. Weight loss, rough or dull coat, and bleeding gums are more serious signs that things have progressed. At three months, if you're supplementing daily and getting fresh veg in regularly, you're very unlikely to see any of this. But weigh them weekly on a kitchen scale — a consistent weight is the simplest indicator that two young piggies are thriving. If either one drops more than 50g over a week without an obvious reason, that's a vet visit.

You're all set. Beaphar Vitamin C, daily bell pepper or parsley, and weekly weigh-ins — that's genuinely all you need to keep scurvy well off the table for your Coronets. Enjoy them at this age; three months is a wonderful time.