Hedgehog
Small Mammals
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. A newly acquired hedgehog gets closer to 2 nights, since some stress refusal is expected. 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 a heavier round lands around 4 months, 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 $200 to $400 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, $200 to $400 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
Prices and the reasoning behind each item are in How Much Does a Hedgehog Really Cost?.
❓ Frequently 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?
Multiple sources converge on roughly 24 hours as the outer limit before a vet visit is warranted. For a newly acquired hedgehog still adjusting, breeders are a bit more lenient, around 2 nights, before recommending a call for help, since some initial stress-related refusal is expected.
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.
📚 Encyclopedia
Hedgehog
Atelerix albiventris
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⚖️ Legal Guide
📰 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! Each spine lasts about a year before it falls out and a new one grows in its place. Baby hedgehogs are born with their spines just below the skin.
🦔 Cuddle Drones
Hedgehogs can run at speeds up to 6 miles per hour, which is quite fast for such small creatures! But don't be fooled by their spiny exterior; they love to curl up into little balls for cuddles when they're feeling safe.