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Do Squirrels Need Salt Licks? Why They Seek Sodium

Squirrels crave sodium because a nut and seed diet is short of it, and will gnaw salt-treated timber to get it. Why a garden salt lick is still a bad idea.

By Zakaria 2 min read Save to Pinterest — opens Pinterest in a new tab
Two young squirrels on a birch log whose bark has been gnawed away
Photo: Alexas_Fotos, Pixabay Content License, via Pixabay
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The craving is real — a nut-and-seed diet genuinely runs short of sodium. Supplying it on purpose is still the wrong move in a garden.

Two different reasons a squirrel gnaws

behaviourreasonwhat it targets
Tooth wearincisors grow continuouslyplastic, aluminium, bark, antler, bone
Sodium seekinglow-sodium dietsalt-treated timber, road salt, mineral blocks

Telling them apart matters, because the fix differs. Tooth-wear gnawing is stopped by a barrier; sodium-seeking gnawing is stopped by a barrier and by not adding more salt nearby.

Why not to put one out

  1. It concentrates squirrels in one spot, and raises damage near it
  2. It brings deer, often within days
  3. It may be regulated — mineral baiting rules vary by state and country
  4. They do not need it — natural sources cover the requirement

Salted human food is a separate issue and the answer is always no

Sodium-seeking behaviour is not a licence to hand over salted nuts or crisps. Small mammals with no high-sodium adaptation are harmed by the quantity involved.

If treated decking is being chewed, flash the edge

Thin aluminium or galvanised sheet over the gnawed edge ends it. Adding a competing salt source nearby just moves the squirrels closer.

Common questions

Do squirrels need salt licks?

They need sodium, but they do not need you to supply it. A diet of nuts, seeds and vegetation is genuinely low in sodium, and squirrels seek it out — gnawing salt-treated timber, road-salted surfaces, mineral blocks put out for livestock and even sweat-stained tool handles. In a garden they find enough from natural sources and road runoff. Putting out a salt lick concentrates squirrels, encourages gnawing near buildings, and attracts deer and other animals you may not want.

Why do squirrels chew on wood and plastic?

Two separate reasons that get conflated. The first is tooth wear — incisors grow continuously and must be worn down, so gnawing is a maintenance behaviour with no nutritional motive. The second is sodium, where salt-treated timber, pressure-treated decking and road-salted surfaces are the actual target. Chewing on plastic and aluminium is almost always the first reason, not the second.

Can squirrels eat salted peanuts?

No. The sodium craving is real and the quantity in a salted peanut is in a completely different range from what they can process — small animals with no adaptation to a high-sodium diet are harmed by it, and it compounds the other problems with peanuts, which are low in calcium and prone to aflatoxin when damp. Unsalted, raw and in moderation is the only sensible form.

Will a salt lick keep them off my house?

It tends to do the opposite. A sodium source attracts squirrels to a specific place and raises local numbers, and a squirrel that has learned your garden is worth visiting is more likely to test the soffits. If salt-treated timber on your deck is being gnawed, the fix is metal flashing or a physical barrier on the chewed edge, not a competing salt source.

Do other animals use the same licks?

Yes, and this is part of why they are a poor idea in a garden. Deer, porcupines, rabbits and livestock are all drawn to mineral blocks, and a lick put out for squirrels will reliably bring deer into a garden. In several jurisdictions baiting deer with mineral blocks is also regulated or prohibited, so it is worth checking before putting one out.

What do squirrels get minerals from naturally?

Soil, bones and antlers, fungi, buds and bark all contribute. Squirrels gnaw shed antlers and old bones for calcium and phosphorus as well as for tooth wear, eat soil at particular spots, and take a wide range of fungi. A healthy mixed habitat supplies this without intervention, which is the honest answer to whether the garden needs to help.

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