Ferret Nation vs Critter Nation

Buy the Critter Nation if you have kits, might have kits, or have any doubt: its half-inch bar spacing holds an animal that the Ferret Nation's one-inch spacing does not. Buy the Ferret Nation if your ferrets are grown adults you have measured against a one-inch gap and you value climbing purchase — it has marginally more floor per level at 900 square inches against 864, wider bars to climb, and usually costs less.

These are the two cages almost every ferret owner ends up choosing between, and the incumbent pages covering this comparison do it without a spec table at all. So here is the table first.

The table

Look at how little differs. One inch of depth, 36 square inches of floor per level, half an inch of height. These are the same cage from the same manufacturer with the same components. The only specification that differs meaningfully is the bar gap, and it differs by a factor of two.

Why half an inch matters

A ferret assesses a gap with its head. If the skull passes, the animal passes, because the ribcage and shoulders compress in a way the skull does not. A ferret kit's skull passes a one-inch gap.

That is the entire mechanism, and it explains the pattern in reported escapes: they are overwhelmingly young animals, from wide-barred cages, and the owner is genuinely surprised because the cage held the adult ferrets in the same household perfectly well. The gap did not change. The animal did.

It also explains why the fix is a different cage rather than a modification. You cannot retrofit narrower spacing onto a one-inch cage — lining it with mesh creates a gap between mesh and bar that an animal can get into and become trapped in, which is worse than the problem. See ferret escape-proofing.

What the Ferret Nation genuinely does better

We are not going to pretend this is a one-sided comparison, because it is not.

Climbing. One-inch bars give a ferret purchase that tight horizontal mesh does not. Ferrets climb, and a cage they can climb is a cage with more to do in it. This is a real behavioral benefit and it is the main reason experienced owners with adult animals choose the Ferret Nation deliberately rather than by accident.

Floor. 900 square inches per level against 864 — about 4 percent more. Marginal, and it is in the right direction.

Price. Usually less than the equivalent Critter Nation, which matters when you are also buying hammocks, liners, litter trays and a carrier.

What the Critter Nation gives up

Chiefly the climbing. Half-inch horizontal mesh is harder to grip, and a ferret in a Critter Nation uses the ramps and hammocks more and the walls less. That is a genuine loss and it is why we recommend hammocks at multiple heights and a sleep sack per animal to put the vertical dimension back — see ferret bedding and liners.

It is also marginally smaller per level, heavier to handle, and typically more expensive. None of which outweighs a bar gap a kit can get through.

The verdict, by owner

• A kit, or a kit arriving: Critter Nation. Not a preference. The one-inch cage does not reliably hold a young ferret.
• A small jill: Critter Nation. Small adults can flatten a head through one inch, and measuring is harder than it sounds on a wriggling animal.
• Grown hobs, measured, and you want climbing: Ferret Nation is a defensible choice and a cheaper one.
• Uncertain, or buying for the long term: Critter Nation. Ferrets live six to ten years and you will not have the same animals throughout. The cage outlasts the certainty.
• Neither fits the room: the Prevue Feisty Ferret has a 31-inch footprint, 4.3 square feet per level and 7/8 inch bars — smaller and closer to the Ferret Nation's risk profile. See best ferret cages.

The full assessments

Our pick · Ferrets of any age, and kits especially

MidWest Critter Nation Double Unit (162)

The half-inch bar spacing is the whole argument: it is the same cage as the Ferret Nation with a gap a ferret kit cannot get its head through.

✓ Clears our threshold6 sq ft per level and 1/2 in bars

Dimensions

36 x 24 x 63 in including the rolling stand

Continuous floor

36 x 24 = 864 sq in (6 sq ft) per level, two levels

Bar spacing

1/2 in horizontal

Material

Powder-coated steel with deep removable plastic pans

Levels and ramps

Two levels with a locking swing-up ramp and full-width doors

What it gets right

• +1/2 in bar spacing holds a kit that 1 in spacing does not
• +6 sq ft of usable floor per level, comfortably over our per-level bar
• +Full-width doors mean you can reach every corner, which matters weekly
• +Deep pans contain litter rather than spreading it

What it gets wrong

• −Horizontal half-inch bars give less climbing purchase than wider spacing
• −Heavy and awkward to assemble alone
• −The stand's casters roll on hard floors more than you want them to

Who should buy something else

Not necessary if your ferrets are adults and you have measured their head width against 1 in. The Ferret Nation costs less and climbs better; the half-inch is insurance you may not need.

Specifications read from MidWest product listing and retailer specifications on 27 September 2026. Floor-area arithmetic is ours and is shown above so you can redo it.

Illustrative

Our assessment9.5/10

• Bar spacing safety10
• Usable floor per level9
• Cleaning access10
• Build quality9
• Escape resistance10

Check price on Amazon→

We do not print prices. #ad Disclosure

Number 2 · Adult ferrets that climb

MidWest Ferret Nation Double Unit (182)

Slightly more floor per level than the Critter Nation and a one-inch bar gap, which is fine for a grown ferret and the reason kits escape.

≈ Clears part of itFloor passes; 1 in bars fail our half-inch filter for kits

Dimensions

36 x 25 x 62.5 in including the rolling stand

Continuous floor

36 x 25 = 900 sq in (6.25 sq ft) per level, two levels

Bar spacing

1 in

Material

Powder-coated steel with deep removable plastic pans

Levels and ramps

Two levels with locking swing-up ramps and ramp covers

What it gets right

• +6.25 sq ft per level, marginally more than the Critter Nation
• +1 in bars give much better climbing purchase
• +Same full-width doors, deep pans and locking ramps
• +Usually cheaper than the equivalent Critter Nation

What it gets wrong

• −1 in spacing is the single reason ferret kits get out of this cage
• −No way to retrofit narrower spacing; the fix is a different cage or wire panels

Who should buy something else

Never for kits, and not for a small jill who can flatten her head through a one-inch gap. Measure the animal, not the marketing, and buy the Critter Nation if there is any doubt.

Specifications read from MidWest product listing on 27 September 2026. Floor-area arithmetic is ours and is shown above so you can redo it.

Illustrative

Our assessment8.6/10

• Bar spacing safety6
• Usable floor per level10
• Cleaning access10
• Build quality9
• Climbing10

Check price on Amazon→

We do not print prices. #ad Disclosure

Both cages clear the VCA suggested minimum several times over, which is the reason this comparison comes down to bar spacing rather than size. If you want the fuller argument about why per-level floor and containment are the right filters for this species, it is in ferret cage size requirements. And if you are choosing between the double and the single Critter Nation, that is Critter Nation 161 vs 162.