5 Signs Your Guinea Pig's Cage Is Too Small (And What Size They Need)

If you've lived with guinea pigs for a while, you'll know they're brilliant at telling you how they feel. They wheek, they popcorn, they sulk in the corner. Sometimes what they're telling you is that home has become a bit of a squeeze.

Lots of cages sold in pet shops are smaller than most welfare groups recommend, so it's easy to end up with a set-up that looks fine but doesn't meet your piggies' needs. If you've been wondering whether your guinea pig cage is too small, here are five signs to look for, followed by the sizes to aim for.

1. There's no room to run

Guinea pigs aren't couch potatoes. Given space, they trot laps, dart between hideouts and leap into the air in a burst of joy known as popcorning. If yours can only manage a few steps before meeting a wall, they can't move the way nature intended.

Watch them at floor time. If they go from sleepy in the cage to racing round the living room, the cage isn't giving them enough exercise.

2. Everything is crammed together

Are the hideout, food bowl, water bottle, hay and toys all piled into one area? Guinea pigs like to divide their space into zones: somewhere to eat, somewhere to sleep, somewhere to toilet and somewhere to explore.

Without room to keep those areas apart, they end up sleeping beside the toilet corner or eating in their bedding.

3. They're squabbling more than usual

Guinea pigs need company, but even the closest pair needs a bit of personal space. When room is tight, small disagreements can become chasing and teeth chattering.

Rule out health problems with your vet first, then ask whether each piggy can get away from the other when they want to. More floor space and a second hideout often calm things down.

4. Bar chewing and repetitive behaviour

Chewing the bars, pacing the same edge and rattling the water bottle can all point to boredom or frustration. A small cage leaves very little to forage for or investigate.

Occasional nibbling is normal. It's constant, repetitive behaviour that's worth taking seriously.

5. They seem flat, or the cage never stays clean

Piggies without room to move can become less active, which can lead to weight gain and a low mood. If your once lively pair now spend the day in one corner, take note.

A cramped cage also fouls quickly. If you're spot cleaning constantly and still can't keep the floor dry, the space may be too small for the animals living in it.

What size should a guinea pig cage be?

Many UK guinea pig welfare groups and rescues suggest at least 120cm x 60cm (roughly 4ft by 2ft) of floor space for two guinea pigs. Treat that as the bare minimum. Many people go larger, around 150cm x 60cm for a pair. The RSPCA doesn't give an exact figure, but its guinea pig housing guidance says they need a space that's large enough to exercise, hide and stretch out in, and that a traditional hutch shouldn't be their only permanent home. It's worth checking the guidance now and again, as recommendations can change.

Floor space is what counts, and width matters as much as length, because it lets two piggies pass each other comfortably. A second level is a bonus for extra hideouts, not a substitute for a bigger base. If you're wondering whether your cage is big enough, it probably isn't.

Room to live, and room for you

If your cage is showing several of these signs, please don't feel guilty. Most of us started with whatever was on the shelf. A bigger home is one of the most rewarding changes you can make, and you'll often notice more running, chatting and popcorning within days.

We make our enclosures by hand in the UK from solid pine with clear Perspex sides. Inside, the floor measures 140cm x 70cm (0.98 square metres). That's about 9% more floor than a 150cm x 60cm enclosure, and well above the commonly recommended minimum. The Perspex keeps urine out of the wood, which is a common reason enclosures start to smell, and the wipe clean plastic tray makes cleaning quick. Our own guinea pigs lived in the dining room and it stayed fresh.

Living where the family is has another benefit. Piggies in a busy, open plan room lose their fear of people quickly, and they soon learn what food being prepared sounds like. Hand taming with treats tends to be much faster.