This is a specific conversation about Guinea pig supplies — the essentials — ask about yours and get one honest answer for your exact situation.
inparticular.ai
Recurrent eye discharge in a guinea pig often has an environmental trigger, and hay dust is one of the most common culprits — so you're asking exactly the right question. Before I point you toward a specific hay, a couple of quick things: is this one guinea pig or do you have a pair? And has your vet already ruled out infection or dental issues as the cause, or are you still working through that? Knowing where you are with the diagnosis helps me give you more useful guidance.
It's just one guinea pig, she's two years old. The vet checked her over and said her teeth and eyes look fine structurally — they think it's irritation from the hay we've been using. We've been buying a cheap supermarket bag and they suggested switching to something dust-extracted.
inparticular.ai
That's really useful — and a lonely note: a single guinea pig is worth addressing too, since they're genuinely social and do much better in pairs. But let's sort the hay first. The vet is almost certainly right. Cheap supermarket hay is often poorly processed and full of fine dust and loose fragments that sit right at eye level in a hutch. The fix is straightforward: you need a hay that's been properly dust-extracted, not just described as 'fresh' or 'natural.' Can I ask what size bag you typically go through in a week or two? That'll help me suggest the right format.
She goes through quite a lot — probably a medium-to-large bag every week or so. I want something I can buy reliably rather than hunting around.
inparticular.ai
Perfect — then my clear recommendation is Oxbow Western Timothy Hay. It's a 1.13kg bag, widely available on Amazon UK with consistent stock, and it's one of the few hays at this price point that goes through a genuine dust-extraction process rather than just marketing itself that way. Timothy hay is also the correct dietary staple for an adult guinea pig — high fibre, low calcium, which matters more as they age. The texture is consistent bale-cut rather than the dusty crumble you get from supermarket bags. For a guinea pig with eye sensitivity, the difference is usually noticeable within a week or two of switching.
That sounds good. Should I be doing anything else differently — like how I store it or where I put her hay rack?
inparticular.ai
Yes, both things matter. Store the hay in a breathable cloth or paper bag rather than sealing it in plastic — sealed hay sweats and grows mould spores, which are worse than dust. As for the rack: if it sits above her head height, she's burying her face in hay every time she eats, which is exactly where the irritation comes from. A low rack or a hay box at ground level makes a real difference for a guinea pig prone to eye issues. And do keep the vet loop open — if the discharge hasn't improved noticeably within three to four weeks of switching hay, it's worth another check rather than assuming it just needs more time.
Really helpful, thank you. I'll order the Oxbow and look at changing her rack position.
inparticular.ai
Good plan. Oxbow Timothy is a reliable switch and your vet will likely approve the choice if you mention it at the next visit. One last thing worth sitting with: once her eye situation has settled, it's genuinely worth considering a companion for her. Two guinea pigs don't cost dramatically more to keep, and the difference in their behaviour and wellbeing is significant. A same-sex pair from a rescue is a great route. Good luck with her — hope you see an improvement quickly.
Your situation is probably different. Get a specific answer for yours.
