Small Pets

Ferret

Mustela putorius furo

Playful obligate-carnivore escape artistsAdvanced

Lifespan: 6-10 years
Size: 33-50cm including tail
Weight: 0.7-2kg
Social needs: Social; happiest in pairs or small groups
Time: High; 3-4+ hours supervised play daily
Cost: High
Diet: Obligate carnivore; high-protein meat-based

Overview

What is this animal?

Ferrets are domesticated mustelids, not rodents, and are obligate carnivores with the curiosity and athleticism of a small predator.
They sleep 14-18 hours a day but are intensely energetic when awake, often performing a bouncing "weasel war dance." They bond with people and other ferrets and learn routines and litter habits.

They suit dedicated, experienced keepers.
Their high needs, frequent veterinary issues, and musky odor make them a poor impulse purchase.
In some regions they are restricted or banned, so check local law before committing.

Temperament

Ferrets are mischievous, intelligent, and affectionate, forming clear bonds with their humans and cage-mates.
They communicate with chirps, hisses, and "dooking" chuckles, and most enjoy gentle handling, tunnels, and interactive games.
Kits nip while learning bite inhibition and need patient, consistent training.

They are not ideal for very young children or hands-off owners.
Without enough stimulation they become bored, destructive, or withdrawn.
A compatible companion ferret plus rich daily enrichment keeps them mentally healthy.

A good fit for

Experienced, very hands-on owners
Households able to give hours of daily play
Keepers wanting a dog-like interactive small pet
Homes that can be fully escape-proofed

Common mistakes to avoid

Feeding dog food, fruit, or carbohydrate-heavy diets
Skipping distemper vaccination
Soft rubber/foam toys causing fatal blockages
Heatstroke above roughly 28-30C

Enclosure

Minimum 5,400 cm² of floor (837 sq in) — for the pair · 90 × 60 × 60 cm

Cannot be kept alone. The minimum is 2, and the space above is for that group.

Provide a tall, multi-level wire cage of at least 90x60x60cm for one or two ferrets, with solid shelves, hammocks, and a litter tray.
The cage is only a base camp: ferrets need several hours of supervised free-roaming exercise every day in a thoroughly ferret-proofed room.

They are skilled escape artists who squeeze through gaps as small as 2.5cm and chew or dig at anything.
Block all holes, secure cupboards, and remove soft foam and rubber, which can cause fatal intestinal blockages.
Keep them cool; they risk heatstroke above about 28-30C.

Check your enclosure

Supplies

Setup

Enclosure of an adequate size
Water bottles, bowls, hides and enrichment
Carrier and travel box
Digital kitchen scale

Ongoing

High-protein ferret kibble (32-38% protein, 18-20% fat)
Frozen whole prey or raw meaty pieces if feeding raw
Freeze-dried plain meat treats
Heavy ceramic food bowl plus a water bowl
Water bottle as a backup supply
Airtight kibble bin to stop fats going rancid
Kitchen scale for weekly weigh-ins

Safe substrate: Dust-extracted paper bedding · Kiln-dried aspen shavings · Hemp bedding

Work out the cost

Care routine

Daily

Clean the litter boxes
Feed and clear yesterday's leftovers
Fresh water
Out-of-cage play
Spot-clean the enclosure
Watch them while they are awake

Weekly

Clean the teeth
Hands-on health check
Rotate enrichment
Sweep the play space for hazards
Wash hammocks and bedding
Weigh-in

Monthly

Deep-clean and change beddingevery 2 weeks
Nails and earsevery 2 weeks
Check nails and teeth
Check supplies and dates

Vet: Annual exam and vaccinations — every 12 months (every 6 months from 3 years old)

Top resources for more info

Independent creators and organisations we would send a friend to. We have no affiliation with any of them, and nothing here is sponsored. Links checked 2026-09-19.

YouTubers

Victoria RaechelHamster and rabbit care, cage setups and honest myth-busting EmiologyRat and mouse care from a zoology graduate; housing, diet, enrichment Scotty's AnimalsGuinea pig and small-animal care from a rescue volunteer

Sites

American Ferret AssociationUS ferret society with care and health information RSPCA: ferretsHousing, diet, company and health guides for ferrets Merck Veterinary Manual: ferretsVet-authored owner reference on ferret health

Go deeper

Diet

As obligate carnivores, ferrets need a diet very high in animal protein and fat with little carbohydrate or fibre.
Feed a quality ferret kibble, or a balanced raw or whole-prey diet, with roughly 32-38% animal protein and 18-20% fat.
Avoid dog food, fruit, vegetables, and sugary treats.

Their gut transit is only about 3-4 hours, so food should be available frequently or free-fed, with constant fresh water.
Sugary or carbohydrate-heavy diets are linked to insulinoma, a common ferret cancer.

Health

Ferrets are prone to several serious conditions: adrenal gland disease, insulinoma (pancreatic tumors causing low blood sugar), lymphoma, and dental disease.
Early-neutered animals from large breeding mills are especially predisposed to adrenal disease.
Annual checks, moving to twice-yearly with age, are advised with an exotic vet.

They require core vaccination, typically against canine distemper, which is almost always fatal in ferrets, and against rabies where mandated.
Keep them away from infected dogs.
Sudden weakness, drooling, or hind-leg collapse can signal an insulinoma crisis needing urgent care.

Is your enclosure big enough?

Minimum floor area5,400 cm² (837 sq in) of continuous, unbroken floor

As dimensions90 x 60 x 60 cm

Height60 cm minimum. This species climbs, so height is not optional.

CompanyCannot be kept alone. The minimum is 2, and the space above is for that group.

Length

Width

Height

Units

Is this urgent?

Ferrets hide illness less well than rodents, but they deteriorate faster. Weekly weighing still catches the most.

Go now

Repeated vomiting, pawing at the mouth, or straining with nothing producedGo now. Ferrets swallow things. A blockage is a surgical emergency and they cannot wait it out.

Now

Sudden hind-leg weakness or collapseGo now. Rub a little honey or syrup on the gums on the way if the ferret can swallow. Often a blood-sugar crash, which is treatable if caught quickly.

Now

Today

Symmetrical hair loss starting at the tail, or a swollen vulva in a spayed femaleBook an appointment. A well-recognised hormonal condition that responds far better to early treatment.

This week

Steady weight loss over several weeksCall with the weight log. Weekly weigh-ins catch most ferret problems earliest.

Today

This is general guidance for a healthy adult, not a diagnosis. An exotics vet who knows your animal always overrides it — and the time to find one is before you need one.

Can a ferret eat that?

Most small companion mammals are hindgut fermenters: the gut is a fermentation vessel that has to keep moving, and sudden rich food stops it.

Check a food

The full list

Never (19)

AlcoholNo safe amount at any body weight on this site.

never

AvocadoPersin, concentrated in the skin, stone and leaves. Implicated in cardiac damage across birds, rodents and reptiles.

never

Bread and baked goodsRefined starch ferments in the hindgut and causes gas and stasis. No nutritional case for it either.

never

CaffeineCoffee, tea and energy drinks. Cardiac and neurological toxicity at tiny doses for an animal this size.

never

ChocolateTheobromine and caffeine. Small mammals and reptiles cannot clear either.

never

DairyAdults are lactose intolerant and the gut flora cannot handle it.

never

Dried fruitSugar concentrated several times over, and it sticks to the teeth. Most commercial small-pet treats are exactly this.

never

GarlicSame allium toxicity as onion, and more concentrated by weight.

never

Iceberg lettuceAlmost entirely water with negligible nutrition, and it contains lactucarium, which causes diarrhoea in quantity. It displaces food that would have been useful.

never

LeekAllium family. Same mechanism as onion and garlic.

never

MeatA hindgut fermenter has no way to process animal protein. It disrupts the gut flora the animal depends on.

never

MushroomsNot part of any of these animals' natural diet, and the risk from misidentified varieties is not worth the zero upside.

never

NutsFat and phosphorus loads a herbivore is not built for, and a choking risk.

never

OnionOrganosulphur compounds damage red blood cells. The whole allium family is out.

never

PotatoSolanine in the skin and any green part, plus a starch load the hindgut cannot handle.

never

Raw beansLectins. Also a gas producer in a species that cannot vomit or belch.

never

RhubarbVery high in soluble oxalate, high enough to cause acute kidney injury. The leaves are worse than the stalks.

never

Salty or seasoned human foodSalt, oil and seasoning. Crisps, chips, seasoned leftovers and processed meat are all out.

never

SweetcornThe hulls are indigestible and are a recognised blockage risk in small herbivores.

never

Rare treats (13)

AppleSugar. The seeds contain a cyanogenic compound and must be removed. A thin slice, once or twice a week. Never the seeds or core.

rare treat

BananaVery high in sugar and starch, and most animals will overeat it given the chance. A slice the width of a fingernail, rarely.

rare treat

BlueberrySugar, but a small portion size makes it easy to control. One or two berries, twice a week.

rare treat

Brussels sproutsHighly gas-forming. Half a sprout, rarely.

rare treat

CarrotSold as the archetypal rabbit food and it is nothing of the kind: carrot is a root vegetable with a high sugar content. The leafy tops, by contrast, are an excellent green. A thin slice as a treat. The tops can be fed freely.

rare treat

CauliflowerOne of the most gas-forming brassicas. A very small piece, occasionally.

rare treat

GrapesVery high in sugar. Halve them, because a whole grape is a choking hazard. One halved grape, rarely.

rare treat

OrangeAcidic and sugary; can irritate the mouth and gut. A tiny segment, rarely if at all.

rare treat

PearSugar. Remove the seeds. A thin slice occasionally.

rare treat

PeasHigh in starch and sugar. The pods and leaves are better than the peas. A few pods occasionally.

rare treat

StrawberrySugar, though lower than most fruit. The leaves are actually the better part. Half a small berry, once or twice a week.

rare treat

TomatoThe ripe flesh is safe in small amounts. The leaves, stems and any green fruit contain solanine and must never be offered. A small piece of ripe flesh, occasionally. Never the plant.

rare treat

WatermelonSugar and a very high water content, which together can loosen the gut. Remove the seeds. A small cube in hot weather, rarely.

rare treat

Occasional (17)

BasilSafe and well liked. Rotate rather than relying on it. A few leaves.

occasional

Bok choyGood green, mildly goitrogenic like other brassicas. A leaf or two a few times a week.

occasional

BroccoliNutritious but a notable gas producer. Leaves and stalk are better tolerated than the florets. A small floret or a piece of stalk, twice a week.

occasional

CabbageA brassica. Gas-forming in quantity, and goitrogenic with heavy long-term feeding. A small piece, once or twice a week.

occasional

CelerySafe and well liked. Cut across the stalk so the long fibres cannot catch. A short piece, cut into segments.

occasional

ChardSame oxalate issue as spinach. A small leaf, occasionally.

occasional

CourgetteSafe and mild. Serve raw. A few slices a few times a week.

occasional

CucumberSafe, but it is mostly water with very little in it. Useful for hydration in warm weather, poor as a staple. A few slices.

occasional

DillSafe in rotation. A few fronds.

occasional

Green beansSafe cooked or raw in small amounts. Gas-forming in quantity. One or two, occasionally.

occasional

KaleHigh in calcium and a mild goitrogen. Genuinely nutritious, but not the everyday green it is often sold as. A leaf or two, two or three times a week.

occasional

MintSafe in small amounts; strongly flavoured and not every animal wants it. A leaf or two.

occasional

ParsleyNutritious but relatively high in calcium. Fine in rotation, not as the whole green portion. A few sprigs, a few times a week.

occasional

PumpkinSafe and well tolerated in small amounts. A small cube occasionally.

occasional

RocketPeppery and well tolerated in rotation. A small handful, a few times a week.

occasional

SpinachHigh in oxalates, which bind calcium and contribute to bladder sludge and stones in animals prone to them. A single small leaf, no more than once or twice a week.

occasional

WatercressNutritious, strongly flavoured, high in calcium. A small handful occasionally.

occasional

Everyday foods (6)

Bell pepperOne of the best everyday vegetables here: high in vitamin C, low in sugar, no oxalate problem. Remove the seeds and stalk. A few strips daily.

everyday food

Carrot topsThe leaves are a proper green and much better food than the root. A handful as part of the daily greens.

everyday food

CorianderWell tolerated, aromatic, and most animals take it readily. Part of a daily mixed handful.

everyday food

Dandelion leavesOne of the best greens available, and free. Pick well away from roadsides and anywhere that may have been sprayed. A generous handful daily.

everyday food

Grass hayShould be about 80 percent of what this animal eats, available at all times. It is what wears the teeth down and what keeps the gut moving. Unlimited, always.

everyday food

Romaine lettuceDark leafy lettuce with real nutritional content and a good water balance. A generous handful daily as part of a mixed selection.

everyday food

That food is not on our list. Do not offer it on a guess — check with an exotics vet, or leave it out. Nothing in a small mammal's diet is urgent enough to risk it.

Introduce any new food one at a time, in a small amount, and wait two days before adding another. A change in droppings is the earliest signal that something did not suit.

What it really costs

Setup, monthly, first year and across a whole life, itemised and with the electricity worked out from the actual wattage. Published figures for the same animal disagree by a factor of four, so the calculator shows ranges rather than picking one.

Region

How many animals

Your electricity price, per kWh

Buying the setup

Bedding and substrate

Bedding has three jobs: absorb, stay dust-free, and let the animal dig. Anything aromatic is failing the second one.

Safe

Dust-extracted paper beddingThe default for almost every small mammal. Look for 'dust extracted' on the label rather than 'natural'.

safe

Kiln-dried aspen shavingsThe one wood that is fine, because it has no aromatic phenols. Kiln-dried matters.

safe

Hemp beddingVery absorbent and low dust. More expensive per litre but goes further.

safe

Soft meadow hay as a top layerFood and bedding at once for rabbits, guinea pigs and chinchillas. Never the only absorbent layer.

safe

Plain shredded paper or paper stripsUnprinted or soy-ink only. Cheap nesting material; poor as the main absorbent layer.

safe

Fleece liners over an absorbent layerOnly works with an absorbent layer underneath and a wash every few days. Fleece alone holds urine against the skin.

safe

With a caveat

Cardboard-based beddingFine, but it goes soggy quickly and needs changing more often than paper.

with a caveat

Sand bathsCorrect and important for chinchillas, degus and gerbils. Use plain chinchilla bathing sand, never 'dust' products and never builder's sand.

with a caveat

Hemp or straw pelletsGood absorbency, but too hard to burrow in. Use under a soft layer, not as the whole substrate.

with a caveat

Never

Pine and cedar shavingsThe aromatic phenols that make them smell pleasant are the problem: they damage the liver and kidneys and the cells lining the airway. Laboratory work found liver enzyme changes in mice after roughly a day of cedar exposure, taking well over a week away from it to settle, and enlarged livers in mice kept on pine for months.

never

Raw corncobTwo separate problems. It is swallowed and causes intestinal blockage, and it grows mould readily once damp.

never

Cotton wool and fluffy nesting materialSold as bedding, and it wraps around limbs and is swallowed. Repeatedly implicated in amputations in hamsters.

never

Scented or perfumed bedding of any kindAdded fragrance is an airway irritant in an animal whose nose is centimetres from the bedding all day.

never

Clumping cat litterSwallowed during grooming, and it clumps just as effectively inside the animal.

never

SawdustDust plus, usually, softwood. Both problems at once.

never

This is our general list for small pets. We have not built one specific to Ferrets yet.

Depth matters as much as material for burrowing species. A hamster needs 25 cm or more of substrate it can actually tunnel through; shallow bedding on a large floor is still an inadequate enclosure.