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Squirrels & Wildlife

Do Electric Fences Work for Squirrels? Rarely Worth It

Squirrels jump over, climb past and are poorly earthed on a wire. Where a hot wire does work, and the cheaper barriers that work better.

By Zakaria 2 min read Save to Pinterest — opens Pinterest in a new tab
A grey squirrel walking along the top rail of a wooden garden fence beneath pine branches
Photo: Val_Smir, Pixabay Content License, via Pixabay
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An electric fence needs the animal earthed. A squirrel arrives along a rail or a branch, crosses on something insulated, and is over the top before the circuit ever closes.

Why the usual setups fail

setupwhy it fails
Single hot wire on a fence topanimal not earthed; wire becomes a perch
Electric poultry nettingmesh sized for poultry, passed through
Low wire around a bedjumped, or crossed from a branch
Alternating live/earth, close-spacedworks — but needs a dedicated run

What works instead

barriereffect
Welded mesh cage, 12 mmreliable; stops birds too
Mesh laid flat on newly sown soilstops caching damage
Netted frame, mesh clear of foliagereliable for fruit
Smooth baffle, 3 m clearancereliable on feeders
Capsaicin on bulbs and seedmoderate
Planting daffodils instead of tulipspermanent, free

A wire low enough for a squirrel is at hedgehog height

Small mammals and birds have been injured on badly configured garden setups, and many places require warning signage on electric fencing the public can reach. A non-electric barrier avoids the question entirely.

The two numbers every barrier must respect

  • 3 metres horizontal jump from any fence, bin, wall or branch
  • 1.2–1.5 metres vertical from standing

Most failed squirrel-proofing is a sound barrier with something inside that radius. The clearance is doing the work; the barrier only finishes it.

Most garden damage is digging, not eating

Freshly worked bed soil is the best caching medium in the garden, and uprooted seedlings are a by-product of burying and retrieving nuts. Mesh laid flat over new sowings for a few weeks solves more than any fence does.

Common questions

Do electric fences keep squirrels out?

Rarely well enough to justify the cost. An electric fence works by completing a circuit through an animal standing on the ground, and a squirrel usually is not — it arrives along a fence rail, a branch or a wall, and can cross a wire while touching nothing earthed. It also jumps about three metres horizontally and 1.2 to 1.5 metres vertically, which is more than most garden fence lines are designed around.

Is there any configuration that does work?

A closely spaced multi-wire setup on a run of plain posts, with alternating live and earth wires so the animal completes the circuit across two wires rather than through the ground, is genuinely effective — it is used commercially to protect orchards and maize. In a garden it means a dedicated fence line with nothing to jump from within three metres, which is usually more structure than the problem warrants.

What about electric netting or a single hot wire on an existing fence?

A single hot wire along the top of an existing fence does very little: the squirrel is not earthed, and the wire gives it something to balance on. Electric poultry netting has mesh sized for poultry and is routinely passed through by squirrels. Neither is a serious squirrel measure, whatever they do for foxes or rabbits.

What actually keeps squirrels out of a vegetable garden?

A physical cage. Welded mesh at 12 mm over a frame, or a netted fruit cage with the mesh held clear of the foliage, excludes them reliably, and it also stops birds. For beds rather than fruit, mesh laid flat over newly sown soil stops the digging that does most of the damage — and that digging is caching behaviour rather than feeding.

Are there safety or legal issues?

Energisers sold for livestock deliver a short high-voltage pulse that is safe for large animals, but small mammals and birds have been injured on poorly designed setups, and a wire low enough to catch a squirrel is also at hedgehog and pet height. Many jurisdictions require warning signage on electric fencing accessible to the public. For a garden, a non-electric barrier avoids all of this.

What is the cheapest thing that actually works?

Changing what you grow, where that is an option — tulips and crocus are eaten, daffodils, alliums, fritillaries and snowdrops are left alone. After that, mesh over newly sown soil, a smooth baffle on any feeder pole with three metres of clearance, and capsaicin on bulbs and seed. All of it costs less than an energiser and a fence line, and none of it needs maintaining.

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