Kitten Guides

Cat-Proofing a Garden: Netting, Fencing and Catios

We ask our families to keep their cats indoors with secure outdoor access rather than allowing them to roam. That is not a request to keep a British Shorthair shut away from the world — quite the opposite. Fresh air, birdsong, sunshine and the smell of wet earth are worth a great deal to a cat, and a well-made enclosure gives all of it without the roads, the dogs, the thefts and the fights. This guide sets out the honest options, what each one costs you in money and in appearance, and the details that decide whether a garden is genuinely secure or merely looks it.

Survey the Boundary First, and Think Like a Cat

Before you price anything, walk the whole perimeter slowly and look upwards as much as outwards. Cats do not tackle a barrier head-on; they find the shortcut. Many adult cats clear a standard 1.8 metre fence with very little effort, and almost any cat will manage it if there is something to launch from. The usual culprits are easy to miss because you stopped noticing them years ago:

• Overhanging branches. A limb that reaches over the boundary is a bridge. Branches may need cutting back, or the trunk itself collaring with a smooth band, and trees inside the garden need to be accounted for where they meet an overhead net.
• Launch pads against the fence. Sheds, bin stores, water butts, log piles, garden furniture, raised beds and barbecues all give a cat the extra metre it needs. Move them well clear or treat the fence above them differently.
• Trellis and climbable surfaces. Trellis, wire, brick with deep joints and heavy climbing plants all offer claw purchase. Anything that helps a cat get up will defeat a system that relies on it not getting up.
• Gaps at ground level and at gates. Kittens in particular go under rather than over. Check beneath fence panels, along the gravel board, and the hinge and latch gaps of every gate.
• The neighbour’s side. Their shed, their trampoline, their pergola and their tree are part of your survey even though they are not part of your garden.

Full Enclosure: Netting Over the Top

Roofing the whole garden with netting carried on posts and tensioned wires is the most secure approach there is. Nothing depends on the cat failing to climb, because there is simply no way out, which makes it the right answer for determined climbers and for anxious owners who want to stop checking. It has a second advantage that is often overlooked: it keeps other cats out as well as yours in, which spares a resident cat the territorial stress of neighbouring toms and reduces the risk of fight injuries and disease passed between cats. The costs are real, though. It is the most expensive option, it is the most visually intrusive, and a large or awkwardly shaped garden may need intermediate posts that change how the space feels. Snow and fallen branches load the netting, so tension and fixings need checking after bad weather.

Fence-Top Systems: Brackets and Rollers

The less intrusive route is to treat only the top of the boundary. Inward-angled brackets carrying netting or rigid mesh create an overhang a cat cannot get past, while free-spinning rollers turn under a paw so the cat cannot take the final pull up. Both work on the same principle: the cat is denied purchase at the very top. That principle has one unforgiving consequence. The system only works if the entire perimeter is treated, including gates, corners, wall returns, the bit behind the shed and the two metres your neighbour’s garage wall occupies. Cats are systematic explorers and will find the one untreated metre, often within days. Rollers in particular depend on being mounted at a genuine height with nothing to stand on beneath them, and neither system suits a boundary that is low, rotten or wobbly — the fence itself has to be sound before anything is fixed to it.

Freestanding Catios and Enclosed Runs

A self-contained catio — a timber-framed, mesh-clad structure standing on a patio or lawn — is the practical answer for a smaller budget, a rented home, a garden that cannot be treated as a whole, or a boundary you have no right to alter. It can be modest, or it can run the length of a wall with several levels inside. Connected to a window or a microchip cat flap by a tunnel, it lets a cat come and go without you opening a door, which is what turns an enclosure from an occasional outing into part of daily life. Look for a solid base or a buried mesh skirt so nothing digs under, a roof section that gives shelter from rain, and a door with a proper latch. Many systems are bolt-together and can be dismantled and taken with you when you move.

Cat-Proof Panels and Mesh Systems

Between those extremes sit rigid mesh panels fixed to the inside face of an existing fence, sometimes with an inward-curving top section. They are tidier than netting, tend to last longer, and stand up better to a cat that likes to climb rather than jump. They are heavier and more expensive per metre than netting, and they still require the whole boundary to be treated to the same standard. Whichever system you choose, the weakest metre sets the standard for the entire garden.

Choose Netting That Lasts, and Think About Wildlife

Netting is where most people are tempted to economise and most people regret it. Use a UV-stabilised, knotless net of an appropriate gauge and buy it from a supplier who specialises in cat containment. Cheap horticultural netting is not stabilised against sunlight and can become brittle and perish within a season or two, and knotted or loose netting is the kind that entangles birds, bats and hedgehogs — and occasionally cats themselves. Keep netting taut rather than baggy, keep it clear of the ground so hedgehogs can pass beneath your boundary rather than through it, and choose a mesh size small enough that a bird cannot push halfway through. Walk the netting every few weeks, and always after high winds, looking for sagging, chafing at fixings and small tears. A secure garden is a maintained garden, not a finished one.

Permissions, Landlords and Neighbours

Take the dull paperwork seriously before you spend. In England, fences, walls and gates above two metres generally require planning permission, as do lower ones next to a highway, and a substantial catio may be treated as an outbuilding with its own conditions. Listed buildings and conservation areas have tighter rules again, so a telephone call to your local planning department is time well spent. If you rent, you will need your landlord’s written consent for anything fixed to the structure, which is precisely why freestanding catios suit tenants so well. And speak to your neighbours before a single bracket goes up: a boundary fence is very often not yours to modify, your deeds or title plan will indicate which side you own, and a friendly conversation about brackets leaning into your own garden is far cheaper than a dispute afterwards.

Making the Space Safe Inside the Boundary

A sealed garden still needs to be a safe one. Lilies deserve particular attention: true lilies and day lilies are seriously toxic to cats, and every part of the plant, including the pollen, can cause acute kidney injury, so they are best removed from a garden a cat uses. Several other common garden plants — among them yew, foxglove and autumn crocus — are also considered harmful, and a reputable toxic-plant list from a veterinary charity is worth checking before you replant. Cover or fence any pond, since a young cat leaning in for a drink is a genuine hazard, and store slug pellets, antifreeze and treated compost somewhere a cat cannot reach. Finally, provide shade and proper shelter. A run in full sun with no roof is unusable half the year and unsafe in a heatwave; a covered corner, a dry bed and a windbreak make the space genuinely year-round.

Enrichment: Why a Boring Enclosure Gets Ignored

An empty square of grass behind netting is safe and dull, and a British Shorthair will look at it once and go back indoors. What holds a cat’s interest is height and variety: shelves and platforms at different levels, a sturdy log or two for claws, a raised walkway along a wall, somewhere warm to sunbathe and somewhere hidden to watch from. Cat-safe planting adds the rest — catnip, which many cats though by no means all respond to, cat grass grown from oat or wheat seed, and cat thyme for those who ignore catnip entirely. Grass nibbling is normal feline behaviour and sits perfectly happily alongside the raw diet our kittens are reared on from day one.

Give a new arrival time before any of this begins. Let your kitten settle indoors first — our first week at home guide explains why the early days are best kept small and quiet — and wait until the vaccination course is complete and your kitten comes reliably when called. Every kitten leaves us vet-checked, vaccinated and microchipped, with five weeks of free Agria pet insurance provided through the GCCF, and in England cats must in any case be microchipped by twenty weeks of age. Our own cats, from Aris to the queens, live indoors with access to a protected, enriched garden, which is the standard we hope every one of our kittens goes on to enjoy. There is more about how we raise them on our ethical breeding page, and the practical kit list is in our homecoming checklist.