Know What You're Dealing With After Dark

A fox is a creature of habit. Once it has found a way into a run, it will return to the same weak point night after night, usually in the quiet hours before dawn. In towns and suburbs, where foxes are bold and used to people, a flimsy coop can be tested within days. Badgers are a different proposition altogether. They are immensely strong for their size, they can tip over lightweight housing, and they will happily tear at mesh that a fox would only sniff at. A determined badger has been known to peel back chicken wire like a sardine tin lid.

The good news is that both animals are predictable. Foxes dig and push. Badgers dig, shove and chew. If you build for the strongest of the two, you will have a coop that keeps out everything from a hungry vixen to a curious cub. Think of it as designing for the worst night of the year, not the average one.

Mesh, Timber and the Strength You Actually Need

The single biggest mistake in home-built coops is chicken wire. It keeps chickens in; it does not keep predators out. Use galvanised welded wire mesh, ideally 16 gauge or heavier, with openings no larger than 25mm by 25mm for the lower sections. A 50mm mesh is acceptable higher up if the frame behind it is solid, but the bottom metre should always be the tighter gauge.

• Frame: 50mm x 50mm treated timber as a minimum, bolted rather than nailed at corners.
• Fixing: galvanised staples every 75mm, plus timber battens screwed over the mesh edges so claws cannot work underneath.
• Roof: a solid or mesh roof on every run. Foxes can climb, and a startled hen will fly.
• Floor: either a solid floor or a mesh base, not bare earth inside the house itself.

Rough-sawn timber gives predators less purchase than smooth planed boards, and a well-braced frame will not shift when something heavy leans against it.

The Buried Skirt: Your Best Defence Against Digging

Most fox losses happen from below. A skirt of mesh buried around the perimeter stops digging in its tracks, and it is far cheaper than losing a flock. You have two good options. The first is to dig a trench 45cm to 60cm deep and bury the mesh vertically, bending the bottom 15cm outwards. The second, which suits heavier clay soils, is an L-shaped apron: lay mesh flat on the ground for 60cm outwards from the run, peg it down, then cover it with soil, turf or paving slabs.

Paving slabs laid edge to edge around the base are excellent, particularly where badgers are active, because they cannot dig through stone and dislike the noise. If you are building from scratch, a shallow concrete strip under the perimeter is the gold standard. Whichever route you take, make sure the skirt is joined to the upright mesh with the same heavy staples, and check it each spring for rust and root damage.

Locks, Bolts and the Small Gaps That Let Trouble In

Foxes are surprisingly dextrous. A simple twist latch or a hook-and-eye can be nudged open by a persistent animal, and badgers have been known to pop lightweight bolts with a shove. Fit a two-point locking system on every door: a bolt at the top and another at the bottom, or a slide bolt with a carabiner through the eye. A small padlock is not overkill on the main door.

Raise the pop hole at least 30cm above ground level and close it with a solid sliding or hinged door each night, not just mesh. Fill any gap wider than a couple of centimetres, and cover ventilation openings with the same welded mesh used elsewhere. Check the join between wall and roof, and around any feed hatch. Predators rarely find the front door; they find the seam you forgot.

Deterrents That Work Without Harming Wildlife

You do not need to trap, poison or harm anything to protect your hens. In fact, snares and spring traps are illegal for good reason, and poisoned bait endangers cats, dogs, owls and hedgehogs. Deterrence is safer and more effective in the long run.

• Light: a motion-sensor light on the coop and run startles foxes and gives you a chance to look outside.
• Sound: a radio left on low overnight, or a sensor-triggered alarm, breaks the quiet a predator relies on.
• Scent: clear food scraps, secure feed bins and move the compost heap away from the run, as both species are drawn by easy calories.
• Electric netting: useful as a secondary barrier, but it must be properly earthed and checked often, as badgers and hedgehogs can suffer if it is faulty.

Remember that badgers are legally protected in the UK. If you suspect badgers are visiting, the answer is better fencing, not confrontation.

A Routine That Keeps the Coop Secure All Year

Even the best coop needs a keeper. Lock the pop hole at dusk and count your birds each morning, because a missing hen is the earliest sign that something has found a weakness. Once a week, walk the perimeter looking for fresh dig marks, loose staples, chewed mesh or a sagging skirt. Replace rusted wire promptly rather than patching it with string or zip ties.

Keep the ground around the run short and clear so you can see the first scrape of a paw. In late winter, when natural food is scarce, step up your checks; that is when foxes test boundaries hardest. A well-built, well-maintained coop protects your flock, and it lets you enjoy the rest of your garden wildlife with a clear conscience.