Why outdoor time is worth doing properly

Rabbits and guinea pigs are grazing animals. A few hours on growing grass gives them exercise, sunlight, fresh air and the chance to browse, root and explore — enrichment that no indoor hutch or pen can quite replicate. It is also good for their teeth and their waistlines, since grazing wears down molars and keeps weight in check.

But an outdoor run is only as good as its weakest point. A startled rabbit can bolt through a gap you did not notice, a fox can tear through flimsy netting in seconds, and a guinea pig left in full sun on a warm afternoon can overheat very quickly. The aim is not to build something Fort Knox-like and then forget about it — it is to build something sturdy, put it in the right place, and stay close by while your pets enjoy it.

Choosing the right spot in the garden

Position matters as much as construction. Look for ground that is shaded for most of the day, particularly between about 11am and 4pm when the sun is strongest. Dappled shade under a tree is ideal, but avoid sitting the run directly under branches where birds roost or where wind can drop debris.

• Partly shaded, never fully sunbaked. A run that is sunny in the morning and shaded by early afternoon suits most small pets.
• Well drained. Avoid hollows where water pools after rain; damp bedding and wet feet lead to problems quickly.
• Close to the house. You need to be able to see and hear the run from a window or while pottering nearby.
• Sheltered from prevailing wind, but not so enclosed that air cannot move through on a hot day.
• Onto grass that has not been treated. Leave at least four to six weeks after any weedkiller or fertiliser before letting pets graze, and check the lawn for buttercups, foxgloves, ragwort and other toxic plants.

Mesh, frames and the details that prevent disasters

The single most common mistake is using chicken wire. It is cheap, but foxes and even determined cats can bite or stretch it, and it rusts through in a couple of seasons. Use welded galvanised mesh, around 16 to 19 gauge, with holes no larger than 2.5cm by 2.5cm for rabbits and considerably smaller for guinea pigs, who can squeeze through surprisingly tight gaps and get their heads stuck.

Height should be generous: around 60cm for guinea pigs and 75cm or more for rabbits, so they can perch upright and stretch without bonking their heads. Rabbits can jump higher than many owners expect, so a run with a secure, hinged lid is far safer than an open-topped one. If the run has no floor, add a skirt of mesh buried 30cm down and turned outwards, or stand the whole thing on paving slabs with a soft area of turf inside — either stops digging escapes.

• Use bolt latches or twist clips, not simple hooks. Foxes nudge and paw at fastenings.
• Check mesh, staples and corners every few days for rust, holes and loosened fixings.
• Make sure there are no sharp wire ends at nose height.
• A solid roof panel gives shade and stops birds of prey and cats from landing on top.

Hideaways, tunnels and safe grazing

A run with nothing in it feels exposed, and an exposed rabbit or guinea pig will often just freeze in a corner. Provide at least two hiding places — a wooden box, a covered tunnel of solid material rather than mesh, or a snug made from a tipped-up plant pot with the base removed. Solid tunnels are better than mesh ones because they feel like a burrow and give genuine cover.

Water should be available at all times, in a heavy ceramic bowl that cannot be tipped, or a bottle fixed to the frame at a height your pet can reach comfortably. Offer freshly picked grass, dandelion leaves, parsley, mint or coriander in small amounts, introducing anything new gradually over several days. Never give lawn clippings, and avoid clover in large quantities, as it can cause bloating.

Supervision, weather and flystrike

Never leave rabbits or guinea pigs unsupervised in an outdoor run. Not for five minutes, not while you answer the door, and never overnight in the UK — foxes, badgers, cats, rats and gulls all take an interest, and a run that looks secure in daylight can be tested hard after dark. Bring them in before dusk, every time.

Keep sessions to roughly 20 to 60 minutes at first and build up slowly, extending the time in cool, settled weather. Guinea pigs cope badly with heat; bring them indoors once temperatures climb towards 25°C, and watch for panting, stretching out flat, drooling or flushed ears. Warm, humid weather also raises the risk of flystrike, so check your pet's rear end twice a day in summer and keep the run and bedding scrupulously clean.

Making outdoor time part of the routine

Handling gets easier if outdoor sessions follow the same pattern each day: fresh water, a quick check of the run, a short supervised graze, then a gentle return indoors with hands washed and a treat offered. Support guinea pigs with a hand under the hindquarters rather than lifting them by the shoulders, and let nervous animals settle in a covered corner before you step away.

Done well, an outdoor run becomes the highlight of your pets' day and one of the most rewarding parts of keeping them. Take the time to get the site, the mesh and the supervision right, and your rabbits or guinea pigs will spend their afternoons doing exactly what they were built to do: grazing, exploring and dozing in the shade.