Guinea Pigs Are Not Easy Pets. After 35 Years, Here Is What UK Owners Need To Know

A father came into the shop last spring with his two children — a boy of about seven and a girl a year or two older. They had clearly been planning this visit for a while. The children knew exactly what they wanted. Two guinea pigs, they said. For the garden. Easy to look after. The boy had already named them.

I sold them the guinea pigs. I also spent fifteen minutes with that family going through everything they needed to know — the space requirements, the diet, the handling, the veterinary costs, the lifespan, the fact that guinea pigs are social animals that need to be kept in pairs and cannot simply be left in a hutch at the bottom of the garden and checked on twice a day.

The father looked slightly surprised by some of it. “The website we looked at just said they were good starter pets,” he told me.

That is the problem, right there. Guinea pigs have been sold to the British public as easy, low-maintenance starter pets for decades. And that description — easy, low-maintenance — has caused an enormous amount of suffering. Not because people are bad owners. Because they were told something that is not true, and they believed it, and by the time they realised, they already had two animals depending on them.

Guinea pigs are not easy pets. They are rewarding, characterful, and genuinely lovely animals to keep — but they are not easy. And after nearly 40 years of selling them, advising on them, and watching what happens when people get them without the right information, I think it is time someone said that plainly.

What A Guinea Pig Actually Is

Before we get into the mistakes, let me make sure we are on the same page about what we are actually talking about.

Guinea pigs — cavies, to use the proper name — are social, ground-dwelling animals originally from the grasslands of South America. They have been kept as domestic animals for hundreds of years, but in their nature they are still herd animals. They live in groups. They communicate constantly. They are prey animals, which means they are wired to be cautious, easily startled, and very good at hiding when something is wrong.

In a UK home or garden, that means a guinea pig needs space, company, a proper diet, regular handling, and an owner who understands how to read its behaviour. It also means a guinea pig that is unwell will hide it — often until it is seriously ill.

Mistake 1: Keeping a Single Guinea Pig

This is the one that bothers me most, and it is the one the pet industry has done the least to address.

Guinea pigs are herd animals. In the wild, they live in groups. They communicate with each other constantly — little squeaks, rumbles, purrs, and whistles that form an ongoing conversation between animals that know each other well. A single guinea pig in a hutch in a UK garden, no matter how much its owner loves it, is living a life that is fundamentally incomplete.

I know people keep single guinea pigs. I know some of them seem fine. But “seems fine” is not the same as thriving. A single guinea pig is an animal that has lost its herd, and the stress of that — quiet, chronic, invisible — affects everything. Its immune system. Its behaviour. Its lifespan.

Keep two. Always. Same-sex pairs work well — two females are usually the easiest combination. Two males can work if they have been raised together, but can become territorial as they mature. A neutered male with one or more females is often the most harmonious arrangement.

If you already have a single guinea pig, introducing a companion is absolutely possible — but it needs to be done carefully with a proper introduction process. Come and talk to us before you just put a new animal straight into the existing enclosure.

Mistake 2: The Hutch at the Bottom of the Garden

The image most UK owners have of guinea pig keeping — a wooden hutch, a small run attached, positioned somewhere in the garden — is one of the most persistent and damaging ideas in small animal keeping. And I say that as someone who has sold a lot of hutches over the years.

The problem is not the hutch itself. The problem is the size, the isolation, and what happens to guinea pigs kept in them.

A standard UK pet shop hutch — the kind sold alongside guinea pigs as a starter package — is far too small for two guinea pigs to live a proper life in. Guinea pigs need space to run. They do not hop or climb like rabbits. They sprint in short bursts, popcorn with excitement, and need room to actually move. The minimum enclosure size I would recommend for two guinea pigs is at least 120cm by 60cm — and bigger is always better.

Mistake 3: Getting the Diet Wrong

Guinea pigs have a dietary requirement that surprises almost every new owner when I tell them — they cannot produce their own vitamin C. Unlike most mammals, guinea pigs lack the enzyme needed to synthesise it. This means they must get vitamin C from their food every single day. Without it, they develop scurvy — a serious, painful condition that affects their joints, skin, and immune system.

The base of a guinea pig’s diet should be unlimited good quality hay — this is the single most important thing they eat. Hay keeps the gut moving and wears down their constantly growing teeth. A guinea pig that does not have constant access to hay is at serious risk of gut stasis and dental problems.

The muesli-style food mixes that most pet shops sell alongside guinea pigs are not the best choice. Guinea pigs pick out the bits they like — usually the sugary, starchy pieces — and leave the rest. They end up with an unbalanced diet and dental problems. Plain pellets and unlimited hay, with fresh vegetables daily, is what I recommend to every owner.

Mistake 4: Not Handling Them Properly From the Start

Guinea pigs are prey animals. Being picked up — lifted off the ground, held in the air, unable to flee — is genuinely frightening for them, especially at first. An owner who does not understand this, and who handles a new guinea pig too roughly or too insistently in the first few weeks, will end up with an animal that bites, struggles, and never settles.

Taming a guinea pig takes time and patience. You cannot rush it. And the owners who get it right are the ones who let the guinea pig set the pace.

Mistake 5: Underestimating the Veterinary Costs

This is the conversation I find hardest to have — because people have already fallen in love with the idea of the guinea pig by the time we get to it. But I have it every time, because the alternative is worse.

Guinea pigs need veterinary care. Proper veterinary care, from a vet who has experience with small animals. And veterinary care for a guinea pig can be expensive — often more expensive, relative to the cost of the animal, than owners expect.

Common conditions I see in guinea pigs include dental problems, respiratory infections, skin conditions, urinary problems, and ovarian cysts in females. These are not rare. They are the ordinary health issues that guinea pigs develop over a five to seven year lifespan. And treating them costs money.

Pet insurance for guinea pigs exists and is worth considering seriously. The monthly premium is modest. The alternative — facing a vet bill you cannot afford for an animal your children are deeply attached to — is far more difficult.

I am not saying this to put people off. I am saying it because the owners who go into guinea pig keeping with clear eyes about the costs involved are the ones who make good decisions — and the ones whose animals get the care they need.

Mistake 6: Ignoring the Warning Signs of Illness

I have written about this at length in other articles — about budgies specifically — but the same principle applies to guinea pigs, and it is just as important.

Guinea pigs are prey animals. They hide illness. A guinea pig that is visibly unwell — sitting hunched, not moving, not eating — has usually been unwell for some time. By the time the signs are obvious, you are often dealing with something serious.

The single best thing you can do is observe your guinea pigs every day — morning and evening — and know what normal looks like for your individual animals. Changes from their normal behaviour are almost always the first sign that something is wrong.

Who Guinea Pigs Are — And Are Not — Right For

Right. After all of that, let me be direct about who I think guinea pigs genuinely suit — and who I think should consider something else.

What I Tell Every Family Before They Buy

When a family comes into Paradise Pets asking about guinea pigs, here is the conversation I have — every time, without exception.

I ask about the space they have. I ask about the children’s ages. I ask who will be doing the daily care — not in theory, in practice. I ask whether they have a vet they would use. I ask whether they understand the lifespan commitment. And I ask whether they are prepared to keep two.

If the answers are right, I am happy to help them choose their animals and send them home set up properly. If the answers suggest they are not ready, I tell them honestly — and sometimes I suggest they think about it for another few weeks and come back.

I would rather lose a sale than sell an animal to a home where it will not be properly cared for. That has been my policy for nearly 40 years. It is not changing.

The Guinea Pigs We Have at Paradise Pets

We stock guinea pigs regularly at Paradise Pets, sourced from trusted UK breeders. We typically have a mix of smooth-coated and longer-haired varieties. Every animal we sell has been health-checked and handled from an early age.

If you are seriously considering guinea pigs and you have read this article and still feel it is the right choice for your household — come and see us. We will walk you through everything in person, show you the animals we have, and make sure you go home with the right setup, the right food, and the right information.

Browse our small animals section to see what we currently have in stock — or ring us on 01793 512400 and we will tell you what is available.

Frequently Asked Questions

Are guinea pigs good pets for children?

They can be, but not in the way most people imagine. Guinea pigs are not naturally cuddly animals — they need time and patient handling to become comfortable with people. They are also fragile and can be seriously injured if dropped. For children aged seven or eight and above, with adult supervision and proper handling guidance, guinea pigs can be wonderful pets. For very young children, they are often not the right choice.

How much space do guinea pigs need?

For two guinea pigs, the minimum I would recommend is an enclosure of at least 120cm by 60cm — and bigger is always better. They also need daily time outside the enclosure in a safe run or indoor space to exercise properly. The standard hutch sold in most UK pet shops is not sufficient on its own.

Can guinea pigs live outside in the UK?

Yes, but with significant caveats. The hutch must be properly weatherproofed, draught-free, and protected from predators. In very cold UK winters, guinea pigs should be brought into an unheated shed or garage — they cannot cope with frost. In summer, the hutch must never be in direct afternoon sun. Outdoor keeping requires more management than most people realise.

Do guinea pigs need vaccinations?

Unlike rabbits, guinea pigs do not currently require vaccinations in the UK. However, they do need regular veterinary check-ups — particularly dental checks, as their teeth grow continuously and problems are common. Find an exotic or small animal vet rather than a general practice if possible.

How long do guinea pigs live?

A well-kept guinea pig typically lives five to seven years. Some live longer. This is a meaningful commitment — particularly if the guinea pigs are bought for children, who may lose interest as they get older. Think carefully about who will care for the animals throughout their entire lifespan.

Where can I get honest guinea pig advice in Swindon?

Come and see us at Paradise Pets, Manor Garden Centre, Cheney Manor, Swindon SN2 2QJ. Or give us a ring on 01793 512400. The advice is free and I have been doing this for nearly 40 years.

Written by Neil — Neil has owned and run Paradise Pets Swindon since 1988. He has kept, bred, and sold guinea pigs and other small animals for nearly 40 years. For advice on any pet, visit us at Manor Garden Centre, Cheney Manor, Swindon — or call 01793 512400.