Why do hedgehogs roll into a ball and raise their spines? Hissing, huffing and helping a new hedgehog settle in
You reach into the cage and suddenly hear a hiss. It's followed by short, choppy "huff-huff" sounds, the spines on its forehead shoot up, and within a few seconds your hedgehog has turned into a spiny ball. There's no need to feel hurt: your hedgehog isn't angry with you, it's protecting itself with its spiny back. As you get to know it, and it gets to know you, you'll see the ball forming less often and that little nose poking out more.
- Rolling up is a defense: A frightened hedgehog uses a muscle to pull the spiny skin on its back around its body and rolls into a ball.
- Spines go down and up: According to Merck, the spines lie flat when the hedgehog is relaxed and stand up in defense.
- Sounds: An uneasy hedgehog hisses loudly; the hissing is broken up by short, cough-like huffs.
- Don't force it open: According to Merck, putting a rolled-up hedgehog in water to make it unroll causes stress. Wait patiently; the hedgehog will unroll when it feels safe.
- Patience pays off: According to Merck, most hedgehogs get used to being handled with patience, and hedgehogs handled every day from a young age become tame adults.
How do the spines go up, and how does a hedgehog roll into a ball?
According to Merck, a hedgehog's back is covered with spines, and this area wraps around its body like a mantle. The spines can be held flat against the body or raised for defense. When the hedgehog is frightened, a broad muscle under the skin pulls the spiny skin down around its body. Then a ring-shaped muscle along the edge of the mantle tightens like a drawstring, and the hedgehog becomes a tight ball with its spines on the outside.
According to Merck, most hedgehogs immediately take up this defensive posture and roll into a tight ball when they're picked up, or when someone tries to pick them up. According to one of Merck's photo captions, in the defensive posture a hedgehog can tense a muscle on its forehead to pull its spiny crown down over its face, partly covering it.
According to Merck, obese hedgehogs often can't roll up fully because of the fat that builds up under the skin. If your hedgehog's face or feet stay outside when it rolls up, talk to your vet about its weight. For weight control: hedgehog diet.
What are your hedgehog's sounds and movements telling you?
| Sound or movement | What it means, according to the sources |
|---|---|
| Snuffling sniffs made by drawing in air through the nose | Normal sounds made while looking for food (Merck) |
| Loud hissing broken up by cough-like huffs | Unease, being disturbed (Merck) |
| Pulling the spines on its forehead down toward its face | Defensive posture (Merck) |
| Rolling into a ball | Fear; it's protecting itself (Merck) |
| Screaming | Very intense distress (Merck) |
If your hedgehog screams often, or its behavior changes suddenly, treat it as a warning sign and call your vet.
Why is a new hedgehog so grumpy?
According to the University of Florida, a hedgehog that has just come home may seem grumpier than it was in its previous home: its whole world has been turned upside down. According to Merck, healthy hedgehogs, even if they're shy at first, open up after a while and explore their surroundings; stressed hedgehogs, on the other hand, may not unroll for hours.
Then there's the question of timing. According to the RSPCA, hedgehogs are nocturnal animals and need to be allowed to rest during the day; you can only spend time with them at night, when they're awake. It's no surprise that a hedgehog woken from its daytime sleep rolls up and hisses.
It gets to know the world through its nose and ears
According to Merck, hedgehogs have very sharp senses of smell and hearing, but poor eyesight. So your hedgehog will know you far more by your voice and smell than by your face. A sudden noise or an unfamiliar smell can easily startle it. To help your hedgehog get startled less often, think about its surroundings too:
- A hide: According to Merck, a hide is a must in the cage. A place it can run to and shelter in helps your hedgehog feel safe.
- A dim corner: According to Merck, hedgehogs avoid bright light; a hide gives them a dim, quiet place to rest during the day.
- A quiet room: Put the cage somewhere with little noise; for an animal with such sharp hearing, sudden sounds can be frightening.
- The same voice, the same hands: Speaking in a low, calm voice every time you approach also fits with the University of Florida's advice not to startle your hedgehog.
For how to set up the cage: hedgehog cages and wheels.
Earning its trust: step by step
Based on the University of Florida's recommendations:
- Approach quietly and slowly: Don't startle your hedgehog; come over slowly and speak softly.
- Lift it from underneath, with two cupped hands: Gently lift it from the belly side, where its fur is soft, with your hands cupped like a bowl.
- If it rolls into a ball, wait: If you keep holding it patiently, after a while it will unroll and start sniffing around.
- Pair it with good things: According to the University of Florida, as your hedgehog learns that tasty treats come from you, it gets less grumpy.
- Repeat often: Pick up your hedgehog often, so it gets used to spending time with you.
According to Merck, hedgehogs handled every day from a young age become tame adults; also according to Merck, most hedgehogs get used to being handled with patience and rarely bite. For the other things to know when starting life with a hedgehog: African pygmy hedgehog care.
Merck notes that putting a rolled-up hedgehog in shallow water to make it unroll is stressful and can affect its body temperature. Don't try to force your hedgehog open; leave it somewhere quiet and wait for it to unroll on its own.
Mind the spines, and your hands
A hedgehog's spines are sharp. The University of Florida recommends picking up a hedgehog with two cupped hands from the belly side, where its fur is soft, so you don't have to hold its spiny back.
There's also the matter of hygiene. According to Merck, hedgehogs often carry Salmonella without showing any signs; the University of Illinois gives the same warning. Wash your hands right after holding your hedgehog, and don't let it come into contact with the kitchen or places where food is prepared.
When should you worry?
It's normal for a new hedgehog to roll up and hiss often in its first weeks. But call your vet without waiting if:
- It has settled in, but suddenly stays rolled up all the time and won't unroll
- It isn't eating, or is quieter or more lethargic than usual
- It seems to be in pain when you touch it, or it screams
If your hedgehog is foaming at the mouth and spreading the foam on its spines, that's a different behavior: self-anointing in hedgehogs.
If you notice a change in your hedgehog's behavior or appetite, you can log it in Tüylüm under Health › Complaint history. How long it has been going on appears at the top of the vet summary.
Frequently asked questions
My hedgehog hisses every time I touch it. Doesn't it like me?
Hissing is a defensive reaction; according to Merck, uneasy hedgehogs hiss loudly. New hedgehogs especially behave this way. According to the University of Florida, as you spend time with it patiently, quietly and often, your hedgehog gets used to you and becomes less grumpy.
My hedgehog rolled into a ball and won't unroll. What should I do?
Don't try to force it open, and don't put it in water; according to Merck, this stresses the hedgehog and can affect its body temperature. According to the University of Florida, if you hold it patiently, after a while it will unroll and start sniffing around. If it stays rolled up for hours, isn't eating or seems lethargic, call your vet.
My hedgehog always rolls into a ball when I pick it up during the day. Why?
Hedgehogs are nocturnal animals and sleep during the day. According to the RSPCA, they need to be allowed to rest during the day, and the University of Illinois also says the best time to spend with a hedgehog is at night. Try spending time with it in the evening, when it's awake.
Keep track of your pet's care in TüylümLog vet visits, vaccine and medication dates, and we'll remind you when it's time. Share it all with your family in Home.
Sources
- Merck Veterinary Manual · Overview of Four-Toed (African Pygmy) Hedgehogs
- Merck Veterinary Manual · Management of Four-Toed (African Pygmy) Hedgehogs
- Merck Veterinary Manual · Diseases of Four-Toed (African Pygmy) Hedgehogs
- University of Illinois College of Veterinary Medicine · How to Care for Your Hedgehog
- University of Florida College of Veterinary Medicine · How to care for your pet hedgehog
- RSPCA · Keeping African pygmy hedgehogs as pets
By Tüylüm · Published and last checked: October 24, 2026. Spotted a mistake? Write to [email protected] and we'll fix it right away. Photos are from Wikimedia Commons, used under the license shown below each photo.
