Hedgehog
Small Mammals
Beastly Facts · Updated
The spiky little explorer that runs on a wheel all night!
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Did you know? When threatened, hedgehogs roll into a tight ball and can make a variety of cute snuffling and hissing sounds. They're surprisingly vocal!
The first week
The numbers a new owner needs in the first week, each from the article it links to. Rows with no link come from the encyclopedia.
- Legal check
- California, Georgia, Hawaii, Pennsylvania, Washington DC, and New York City will not let you keep one, with no permit to apply for. New Jersey has a permit and you need it. Maine and Wisconsin are not permit states, whatever the internet says.Legal guide →
- Enclosure
- At least 2 by 3 feet of solid floor, never wire, with roughly three-quarters of it filled with hides and enrichment. Long and wide rather than tall: hedgehogs are poor climbers and get hurt falling.Setup guide →
- Temperature
- 75 to 85°F, inside a workable 72 to 90°F, from a ceramic heat emitter on a thermostat. Below about 72°F a hedgehog can attempt to hibernate, which can kill it. No light-emitting heat bulbs.Setup guide →
- Humidity and light
- Under 40%. Dim light on a consistent 12-hour cycle for a nocturnal animal.Setup guide →
- Substrate
- Recycled paper bedding, aspen, or fleece liners, 3 to 4 inches deep where it burrows. Nothing dusty, scented, or with loose fibers that trap toes.Setup guide →
- Wheel
- A solid-surface wheel of 10.5 to 12 inches, essential not optional, and cleaned daily: they run and defecate at the same time. Never wire or mesh.Setup guide →
- A hide
- The most commonly missing item: 84 percent of animals in a 2024 owner survey had none. A hideout plus a snuggle sack gives it somewhere dark to sleep through the day.Enrichment guide →
- Living alone
- Solitary. Adults housed together fight, so solo housing is the correct answer, never a compromise.Enrichment guide →
- Feeding schedule
- Once daily in the evening, water available around the clock. Roughly 2 to 3 teaspoons of a protein base plus 1 to 2 teaspoons of chopped produce, adjusted by body condition.Feeding guide →
- Base diet
- A hedgehog-specific kibble or a low-fat cat food, roughly 30 to 50% protein and 10 to 20% fat. Insects are a supplement: 5 to 6 mealworms or 1 to 2 crickets, 2 to 3 times a week.Feeding guide →
- Foods to avoid
- Avocado is toxic. Raw meat, raw eggs, and dairy cause real problems, and nuts, seeds, and hard raw vegetables are choking hazards.Feeding guide →
- Not eating
- Roughly 24 hours is the limit before a vet visit, new arrivals included. Check fecal output, not bowl level.Feeding guide →
- Picking one up
- Scoop from underneath with flat or cupped hands and let the ball unroll on its own time. Never force a ball open. Huffing and balling are reflexes, and the 5,000 to 7,000 quills poke bare hands but do not embed.Handling guide →
- Quilling and self-anointing
- Baby quills go at about a month and permanent spines replace them, later shed one at a time, with grumpiness that passes within a month. Foaming saliva over its own quills after a new smell is normal, not poisoning.Handling guide →
- Quarantine
- At least two weeks for any new arrival, which is how mites are kept out.Health guide →
- Budget
- $100 to $300 for the hedgehog, roughly $180 to $405 for the setup, about $20 to $40 a month plus heating. An exotic vet visit is $80 to $200, and an emergency fund of $500 or more is reasonable.Cost guide →
- Lifespan
- 3 to 6 years typically, some to 8 to 10.Cost guide →
- Adult size
- 5 to 9 inches (13 to 23 cm); 8 to 24 oz.
Emergency card
Call the vet now if you see any of these.
- Any wobbling or change in coordination
- Difficulty fully curling into a ball
- Wheezing, nasal discharge, and lethargy
- A body that feels cold, which may be a hibernation attempt: warm it gradually on the way
Book a vet visit promptly for these.
- Crusting or flaking skin and quill loss
- Scaly patches near the base of the quills, which can spread to people
Always see a vet for wobbling or coordination changes, since cold-related sluggishness, minor strokes, and tumors look similar and are far more treatable.
Where to go next
How Much Does a Hedgehog Really Cost?
$100 to $300 for the animal, $180 to $405 to set up, $20 to $40 a month, and why the legal question comes before any of it.
Hedgehog Enclosure Setup: Temperature Is the Non-Negotiable Part
The 2 by 3 foot floor, the 72 to 90°F range that is the whole ballgame, and the lightless heat emitter that holds it.
Hedgehog Feeding: Schedule, Diet, and Why They Stop Eating
Evening feeding, the portion by body condition, the foods that are genuinely toxic, and the 24-hour rule for a hedgehog that stops eating.
How to Handle a Hedgehog
What huffing and balling actually mean, the scoop that works, quilling, and why self-anointing is not a seizure.
Common Hedgehog Health Issues (And Why Wobbly Hedgehog Syndrome Isn't as Common as You've Heard)
Wobbly Hedgehog Syndrome at 3% rather than the 10% everyone repeats, obesity, mites, ringworm, and the cold that starts most of it.
Hedgehog Enrichment: A Survey of Owners Found What Most Are Missing
The 2024 owner survey: 84 percent with no hide, 68 percent under half a square meter, 17 percent with no wheel.
Is It Legal to Own a Hedgehog? State-by-State Guide
The six places you cannot keep one, quoted from the regulations, and the two permit states that turn out not to exist.
What to buy
As an Amazon Associate I earn from qualifying purchases. Underlined items are paid Amazon links, at no extra cost to you.
Prices and the reasoning behind each item are in How Much Does a Hedgehog Really Cost?.
Full Hedgehog gear listFrequently Asked Questions
How common is Wobbly Hedgehog Syndrome?
Older figures put it at roughly 10% of captive hedgehogs. A more recent 20-year study across multiple US veterinary institutions found a lower confirmed rate, closer to 3%, with average onset around 3.3 years. It's real and serious when it happens, just less common than the older number implies.
How long can a hedgehog go without eating?
Roughly 24 hours is the outer limit before a vet visit is warranted. A newly homed hedgehog often eats less while it settles, so check its droppings as well as the bowl to confirm it is eating at all, and do not stretch the 24-hour line for a new arrival.
Are hedgehogs as cuddly as hamsters or guinea pigs?
No, and the marketing that shelves them together oversells the resemblance. A hedgehog tolerates handling instead of seeking it out, and its temperature needs sit closer to a reptile's than a pocket pet's.
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Deep Dive
🦔 How Much Does a Hedgehog Really Cost?
🦔 How to Handle a Hedgehog
🦔 Common Hedgehog Health Issues (And Why Wobbly Hedgehog Syndrome Isn't as Common as You've Heard)
🦔 Hedgehog Enclosure Setup: Temperature Is the Non-Negotiable Part
🦔 Hedgehog Feeding: Schedule, Diet, and Why They Stop Eating
🦔 Hedgehog Enrichment: A Survey of Owners Found What Most Are Missing
Health and More
Fun Facts
🦔 Spiny Situation
Hedgehogs have between 5,000 and 7,000 spines on their back! Old spines fall out over time and new ones grow in to replace them, just like our hair. Baby hedgehogs are born with their spines just below the skin.
🦔 Panic Pincushions
A hedgehog curled into a ball isn't asking for cuddles, it's on high alert. When threatened, it raises its quills in a crisscross pattern, then uses belly muscles, back muscles and extra skin to tuck in its head, legs and tail. The result is a ball of spikes predators struggle to open. No Sonic rolling, though!
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