Hedgehog Not Eating? Causes & When to Worry

Why Your Hedgehog Suddenly Won't Eat

A hedgehog that stops eating is always worth taking seriously. These animals are small, they hide illness by instinct, and they can go downhill fast, so even a day or two without food matters. By far the most common husbandry reason a pet hedgehog goes off its food is that its enclosure is too cold. Hedgehogs are tropical animals, and when they get chilled they attempt to hibernate — a state that suppresses appetite and can quickly turn life-threatening. Before you worry about anything exotic, check the temperature.

Appetite loss can also point to dental pain, a diet change, a foreign object stuck in the mouth, internal illness, or even cancer, which is unusually common in this species [2]. This guide walks through the likely causes, what you can safely do at home, and the point at which "not eating" becomes an emergency.

Check the Temperature First

Pet hedgehogs need a warm, stable environment. The Merck Veterinary Manual recommends an ambient temperature of 72–90°F (22–32°C), with roughly 75–85°F (24–29°C) being optimal [1]. When the enclosure drops too low, a hedgehog will try to hibernate — but captive African pygmy hedgehogs are not built for it. Cold temperatures below about 68°F (20°C) can push a hedgehog into torpor, a hibernation-like state marked by a greatly diminished response to stimulation and slowed heart and breathing rates [2]. Appetite is one of the first things to disappear.

This is a medical emergency, not a nap. A hedgehog attempting to hibernate may feel cool to the touch (especially the belly), be wobbly, sluggish, or unresponsive, and stop eating and drinking. Torpor from being too cool — or, less often, too warm — is believed to be unhealthy [1], and in a small tropical animal it can turn fatal. A cool, floppy hedgehog needs to be warmed slowly (against your body, on a low heating pad under half the cage, or wrapped in a warm towel) and then seen by a vet. Do not assume it will simply "wake up" on its own.

Once your hedgehog is warm and alert again, review the setup: a reliable heat source (a ceramic heat emitter or under-tank heater), a thermostat, and a thermometer inside the cage so you are measuring the temperature the animal actually feels — not just the room.

Other Common Reasons a Hedgehog Won't Eat

If the temperature is correct and your hedgehog is still refusing food, work through these possibilities:

Dental disease. Tartar, gingivitis, periodontal disease, and oral tumors are all common in hedgehogs [3], and a sore mouth quickly kills the appetite. Dental disease — calculus, gingivitis, and periodontitis — is genuinely frequent in this species [2]. Signs include not eating, bad breath, blood around the mouth, or pawing at the face [3].
A foreign object in the mouth. Hard foods such as a piece of carrot or half a peanut can wedge into the roof of the mouth, causing a hedgehog to stop eating, eat less, or paw at its face [3].
A diet change or picky refusal. Hedgehogs are creatures of habit. Switching foods abruptly, a stale bag of kibble, or simply a new brand can trigger a hunger strike. Make any change gradually by mixing old and new food over one to two weeks.
Obesity and fatty liver. Overweight hedgehogs that then stop eating are at risk of hepatic lipidosis (fatty liver), which itself causes anorexia and is dangerous [2]. That is why an overweight hedgehog who suddenly won't eat needs prompt attention rather than a "diet."
GI problems, parasites, or infection. Gastrointestinal upset, internal parasites, and respiratory infections such as pneumonia all show up as vague appetite loss. External parasites like mites can also make a hedgehog miserable and off its food.
Cancer (neoplasia). Tumors are extremely common in African pygmy hedgehogs — in one survey, more than 80% were malignant — and they are most often diagnosed in animals over three years old [2]. Oral squamous cell carcinoma is especially frequent and may cause mouth odor, swelling, and weight loss [4]. Because the signs are so non-specific, cancer often first shows up as nothing more than a quiet loss of appetite and weight [4].
Wobbly Hedgehog Syndrome. This progressive neurological disease causes an unsteady, wobbly gait and can eventually make it physically hard for a hedgehog to reach or chew food. Learn the warning signs in our guide to Wobbly Hedgehog Syndrome.
Stress or pain. A new home, a new cage, a move, loud noise, or any source of pain can all suppress appetite. Hedgehogs need a few quiet days to settle after a change.

Not eating is one of the most common "something is wrong" signals across small pets — the same is true when a hamster stops eating or a chinchilla goes off its food.

Signs to Watch For

Alongside the untouched food bowl, watch for:

A cool body, especially the belly, or a wobbly, sluggish, or unresponsive hedgehog (a possible hibernation attempt)
Weight loss, a sunken look, or hip and spine bones becoming easy to feel
Bad breath, drooling, blood around the mouth, or pawing at the face
Fewer or abnormal droppings, or none at all
Lethargy, hiding more than usual, or reluctance to uncurl

Because a hedgehog hides illness so well, the combination of not eating plus lethargy and weight loss is a classic non-specific sign of serious disease [4].

What to Do at Home

While you arrange a vet visit, you can safely:

Check and correct the temperature first. Confirm the cage sits in the warm range (about 72–85°F) with a thermometer [1], and gently warm a cool hedgehog before anything else.
Tempt with favorites. Offer familiar, warmed, strong-smelling foods — a little warmed wet cat food, cooked egg, or a favorite insect such as mealworms. Warming food to body temperature makes it more aromatic and appealing.
Keep it hydrated. Make sure fresh water is easy to reach; some hedgehogs drink more readily from a shallow dish than a bottle. If the animal is alert enough to swallow, you can offer water by syringe, a drop at a time.
Weigh daily. A kitchen gram scale is your best early-warning tool. Steady weight loss confirms the problem is real and helps your vet.
Reduce stress. Keep the environment quiet, dim, and predictable while you monitor.

Do not force-feed or syringe-feed a full meal on your own. Critical-care or syringe feeding of a hedgehog that won't eat should be done under veterinary guidance, because forcing food into a weak or torpid animal can be dangerous.

When to See a Vet

Your hedgehog feels cool, is wobbly or unresponsive, or appears to be attempting hibernation — treat this as an emergency and get to a vet after gentle warming [2]
True anorexia (no food at all) for more than 24 hours, or a clear drop in appetite paired with weight loss
Signs of mouth pain such as bad breath, blood, or pawing at the face [3]; drooling; or noticeable swelling around the mouth [4]
Any lump, ongoing weight loss, wobbling, or lethargy — cancer and neurological disease are both common in this species and need a prompt work-up [2]

Frequently Asked Questions

How long can a hedgehog safely go without eating?

Not long. Hedgehogs are small and burn through their reserves quickly, and a fast can trigger fatty liver disease [2]. As a rule of thumb, true anorexia lasting more than 24 hours — or any refusal to eat paired with a cool body, lethargy, or weight loss — warrants a same-day call to an exotic-pet vet.

Could my hedgehog just be too cold?

Very possibly — it is the most common husbandry cause. Below about 68°F (20°C), hedgehogs can slip into torpor and stop eating [2]. Confirm the cage sits in the 72–85°F range with a thermometer and gently warm a cool hedgehog right away [1].

My hedgehog is trying to hibernate. Is that normal?

No. Captive African pygmy hedgehogs are tropical and should not hibernate, so an attempt is a temperature emergency. A torpid hedgehog has a slowed heart rate and a weak response to stimulation and can die if it is not warmed and treated [2]. Warm it slowly and call your vet.

Why won't my hedgehog eat its new food?

Hedgehogs are often fussy and dislike abrupt changes. Mix the new food gradually into the old over one to two weeks. If the refusal continues, or is joined by weight loss or lethargy, rule out a medical cause rather than assuming pickiness.

Can dental problems stop a hedgehog from eating?

Yes. Tartar, gum disease, and oral tumors are common and painful, and they often show up first as not eating, bad breath, or pawing at the mouth [3]. A vet can examine the mouth (usually under sedation) and treat the underlying problem.

Is loss of appetite a sign of cancer in hedgehogs?

It can be. Cancer is very common in hedgehogs over three years old, and its signs are frequently vague — just weight loss, low appetite, and lethargy [4]. Because of this, persistent appetite loss in an older hedgehog should always be checked by a vet.

References

Merck Veterinary Manual. Management of Hedgehogs. Merck Veterinary Manual, 2025. https://www.merckvetmanual.com/exotic-and-laboratory-animals/hedgehogs/management-of-hedgehogs
Merck Veterinary Manual. Diseases of Hedgehogs. Merck Veterinary Manual, 2025. https://www.merckvetmanual.com/exotic-and-laboratory-animals/hedgehogs/diseases-of-hedgehogs
VCA Animal Hospitals. Hedgehogs — Problems. VCA Animal Hospitals, 2024. https://vcahospitals.com/know-your-pet/hedgehogs-problems
VCA Animal Hospitals. Hedgehogs — Diseases. VCA Animal Hospitals, 2024. https://vcahospitals.com/know-your-pet/hedgehogs-diseases

Hedgehog Not Eating? Causes, Home Care, and When It's an Emergency