MidWest Ferret Nation Double Unit (182) review

Buy it for adult ferrets whose head width you have measured, and buy the Critter Nation 162 instead for kits or for any animal you have not measured. The MidWest Ferret Nation Double Unit (model 182) is 36 x 25 x 62.5 inches by the retail listing's own bullet, which is 900 square inches — 6.25 square feet — of floor on each of two levels, in about 98 pounds of steel on a castered stand with full-width dual-locking doors. It is usually cheaper than the near-identical Critter Nation and it climbs better. The catch is the specification that decides whether it is safe for your animal: MidWest does not publish the bar spacing for this cage anywhere on its own product page, and the Amazon listing states it twice, differently — the color attribute reads 1 inch wire spacing while one of the feature bullets claims 0.5 inch. Our registry has recorded this cage at 1 inch since 2026-09-27, which is also what the model line means. If the half-inch matters to you, buy the cage where the figure is not in dispute.

This cage appears on five pages of this site — it is a pick on best ferret cages, the subject of the Ferret Nation versus Critter Nation comparison, the alternative named in the Critter Nation review, and it turns up in cage size and the multi-level cage question. It has never had a page of its own, which is a gap, because a buyer searching for the 182 wants the figures rather than a comparison.

Every published figure, and where it comes from

The one-inch question, which the listing now answers twice

The entire difference between the Ferret Nation and the Critter Nation is bar spacing. Same frame, same pans, same doors, same stand. The Ferret Nation has historically been the one-inch cage and the Critter Nation the half-inch cage, and that single difference is why this site recommends the Critter Nation for kits and why the comparison page exists at all.

So it matters that the figure is unverifiable from the maker. MidWest's own Ferret Nation product page publishes no bar spacing, no dimensions and no weight — we checked it on 5 November 2026. The Amazon listing for the 182 publishes a color attribute reading Black: 1 Inch Wire Spacing: Ferret Nation, and a feature bullet in the same listing claiming 0.5 inch vertical wire spacing. Both cannot be right.

We are not going to resolve it by guessing, so here is what we will say. Our registry has carried this cage at 1 inch since the registry was compiled, which matches what the model name has always meant and what the listing's own color attribute still says. The 0.5 inch bullet looks like copy drifting across from the Critter Nation. If you are buying for an adult ferret you have measured, this does not matter — one inch is fine for a grown animal and gives better climbing purchase. If you are buying for a kit, it matters completely, and the right response to a contradictory specification is not to hope: buy the Critter Nation 162, where the half-inch figure is consistent everywhere it appears, and spend the difference on a hammock.

What 6.25 square feet per level buys

VCA Animal Hospitals suggests a minimum ferret cage of 24 x 24 x 18 inches, about four square feet. One level of this cage clears that by more than half again, and the two levels together give 12.5 square feet of floor inside a footprint of 6.25. Stated like that it sounds decisive, and we should be honest about why it is not: the VCA suggestion is smaller than essentially every mainstream ferret cage on sale, so clearing it separates nothing. We use it as a floor, not a target.

The comparison that actually informs a purchase is against the cage next to it on the shelf. The Critter Nation 162 is 36 x 24 in per level — 864 square inches. The Ferret Nation 182 is 36 x 25 in — 900. That is 36 square inches more floor per level, about four percent, which is a rounding error in practice and nothing like a reason to choose between them. The reasons to choose between them are bar spacing, climbing purchase and price, in that order.

What floor area does not do is replace time out of the cage. VCA's housing guidance is explicit that ferrets need hours outside it daily, and no cage changes that. The 6.25 square feet decides whether the animal is adequately housed between those hours. Ferret cage size sets out the whole figure in context.

Four tiers is a counting convention, not four floors

The retail listing describes the 182 as having 4 tiers. That is the shelf-and-level count rather than four full-depth floors: two full levels, each with a shelf. It is worth knowing before you plan the layout, because the usable sleeping-and-living surfaces are the two levels, and the shelves are landing spots. If you have read the listing and budgeted for four ferret-sized floors, you have one level more than exists.

The same caution applies to the ramps. MidWest states the swing-up locking ramps are available on models 182 and 183 only, which is a genuine advantage of this unit over the single — a ramp you can fold up and lock closes the cage into two separate halves when you need to separate animals or keep one off a level while it heals. What fits inside a Critter Nation covers the shelf-and-ramp geometry, which is identical across the two product lines.

Three things better than the Critter Nation

1. 1.It climbs better. Wider bar spacing gives a ferret more to hook a foot into. For an animal that spends its waking hours going up the walls, that is a real difference in what the enclosure offers, and it is the strongest argument for the Ferret Nation over its twin for adults.
2. 2.It usually costs less. The two cages trade places depending on stock, but the Ferret Nation is normally the cheaper of the pair for a marginally larger floor. If the half-inch is not a requirement for your animal, you are paying for climbing purchase rather than against it.
3. 3.The locking swing-up ramps. MidWest publishes these as a 182-and-183 feature. Being able to close a level off, with a latch rather than a cable tie, is the kind of thing you do not think about until a vet tells you to keep one ferret off a ramp for a fortnight.

Three things worse than the reputation

1. 1.Its central specification is not published by its maker. MidWest publishes no bar spacing for the Ferret Nation at all, and the retail listing contradicts itself. On a cage whose entire identity within the product line is its bar gap, that is a documentation failure, and we mark it down for it even though the hardware is good.
2. 2.98 pounds, assembled on the floor and lifted onto a stand. It is marketed as tool-free and broadly is. It is not a solo afternoon. Budget an hour and a second person, and unbox it in the room it is going to live in.
3. 3.The casters roll more freely than you want. They lock, and you should lock them. At this height a cage that moves when an animal throws itself at a door is unsettling rather than trivial, and on a hard floor an unlocked unit does move.

Who should buy which

Adult ferrets, measured, and a preference for climbing: the Ferret Nation 182. Kits, an unmeasured animal, or any doubt at all: the Critter Nation 162, where the half-inch figure is consistent. One adult ferret in a small room: the Critter Nation 161 single unit, which is the same floor in half the height for considerably less. The case for each is laid out on best ferret cages and the single-versus-double question has its own page.

One last practical note. Whichever you buy, the box contains the cage and nothing else: no hammock, no bowls, no bottle, no litter pan. Budget for those at the same time, because a cage this size with an empty interior is a worse environment than a smaller one that is furnished. Best ferret hammocks and best ferret litter boxes are the two purchases that follow immediately.

What else to consider

The bar-spacing documentation gap recorded above is the reason to look at the alternatives. Alternatives to the Ferret Nation sets out three cages matched to it on storeys, hardware or price, one of which is the same chassis from the same maker with a published bar spacing.