Standards
How we assess small pet cages, hutches and bedding
The method, the sources, and the places where our own threshold is stricter than a published minimum. Read this before you trust anything else on the site.
Every product on this site is measured against a floor-area figure published by a named animal-welfare or veterinary body, then against bar spacing, wheel or mesh compatibility, and material. A product that falls below the floor-area threshold is excluded from a recommendation regardless of price, brand or popularity. Our assessment is based on published specifications, not on hands-on testing, and this page says so plainly because it is true.
Most buying guides for small-pet housing share a structural problem: they recommend products without ever stating the number a product has to clear. You can read three thousand words about the best hamster cage and finish with no way to check the fourth cage you find yourself looking at. That is the gap this site exists to close, and this page is where the method is written down.
What gets a product onto a list
Products are filtered in a fixed order. The order matters, because it decides which trade-offs we are willing to make and which we are not.
- 1.Continuous floor area against the published minimum. This is the first filter and the one that removes most products. Continuous means one unbroken surface: shelves, upper levels, tubes and attached tunnels do not count towards it. Where a body publishes a figure, we use the figure. Where it publishes a range, we use the strict end.
- 2.Bar spacing, or the equivalent containment spec. A gap an animal can get its head through is a safety failure that no amount of floor area compensates for. On wire cages we use the manufacturer's published spacing. Where it is not published, the cell in our table says "not published" and the product loses marks for it, because a spec you cannot check before buying is a spec you are trusting on faith.
- 3.Wheel, mesh or substrate-depth compatibility. Species-specific: a hamster enclosure that cannot physically hold a 12-inch wheel has failed even if its floor clears; a rabbit run whose mesh aperture is not published cannot be assessed for predator resistance.
- 4.Material. What the enclosure is made of and what it does over two years of urine, water and chewing. This is also where bedding safety sits, and it is the one filter where the evidence is genuinely mixed in places. We say so where it is.
- 5.Build quality and cleaning access. Last, not first. A cage that is a pleasure to clean and 40 percent too small is still 40 percent too small.
What our assessment is actually based on
This is the section most sites in this category leave vague, so we will be specific. Our assessments are based on three things: the manufacturer's own published specification sheet or product listing, the welfare standards published by the bodies named below, and arithmetic we show on the page so you can redo it.
We do not run a testing lab. We do not own most of the products we assess. There is no product library behind this site, no test rig, and no count of hours spent with a stopwatch. Where a page makes a claim about how something behaves in use, it is because the specification supports that claim or because it is genuinely first-hand, and in the second case the page says which.
Where our numbers come from
Every threshold on this site is attributed at the point of use to the body that issued it, with a link. This is the table of those bodies. Where two disagree, both appear on the relevant page and we say which one we follow and why.
| Body | What it publishes | Where we use it |
|---|---|---|
| PDSA | Hamster minimum cage size 100 x 50cm; bedding at least 25cm (10in); wheel at least 30cm (12in) Syrian, 20cm (8in) dwarf | Hamster cage size, wheel size, bedding depth |
| San Diego Humane Society | Hamster bedding at least 6in, 8-12in best; wheel 8-10in dwarf, 10-12in Syrian | Hamster welfare minimums |
| RSPCA | Rabbit living space no smaller than 3m x 2m x 1m for two. Publishes NO numeric hamster floor-area figure | Rabbit hutch size, hamster welfare minimums |
| Rabbit Welfare Association & Fund | Rabbit enclosure at least 3m x 2m x 1m in a single block; shelter at least 1.8 x 0.6 x 0.6m; platforms do not count | Rabbit hutch size, rabbit welfare minimums |
| Humane World for Animals | Guinea pigs: 7.5 sq ft minimum for two, 10.5 sq ft preferred; walls at least 12in; no wire floors; no cedar or pine | Guinea pig cage size |
| VCA Animal Hospitals | Ferret suggested minimum cage 24 x 24 x 18in; environment at or below 80F (27C); 2-3 hours out of cage daily | Ferret cage size |
| House Rabbit Society | Phenols in pine and cedar shavings raise liver enzymes and interfere with drug metabolism | Pine and cedar bedding, cage materials safety |
All seven were read on 27 September 2026 and each is linked from the page where its figure is used. We cite the body that issued a figure, never another publisher repeating it.
Where our threshold is stricter than a published minimum
A published minimum is a floor, not a target. It is set at the level below which housing is clearly inadequate, which is a different question from what makes good housing. In four places we recommend a figure stricter than the published one. Each is labeled as ours wherever it appears, with the reasoning, so you can disagree with us and still use the published figure.
| Species | Our threshold | Why |
|---|---|---|
| Hamsters | 775 sq in (5,000 cm2) of continuous floor | This is the PDSA figure, adopted as ours because it is the largest minimum we could verify from a named veterinary body and because it applies to dwarf and Syrian alike. The widely repeated 450 sq in figure is discussed on our hamster welfare minimums page. |
| Hamster wheels | 12in solid surface for a Syrian, 8in for a dwarf | PDSA's figure, which for Syrians is stricter than the San Diego Humane Society's 10-12in band. We take the stricter number because a hamster running with a curved spine is invisible to an owner until it is not. |
| Rabbits | 64.5 sq ft (3m x 2m) in one unbroken block | Not stricter than the published figure, but stricter in how we apply it: RWAF says platforms and tunnels do not count, so we exclude them when measuring a hutch-and-run package. That is why almost no package on sale clears our bar alone. |
| Guinea pigs | 10.5 sq ft for a pair, not 7.5 | Humane World for Animals publishes 7.5 sq ft as the bare minimum for two and 10.5 sq ft as preferred. Guinea pigs are obligately social, so a pair is the normal case, and we recommend the preferred figure rather than the floor. |
| Ferrets | 6 sq ft of usable floor per level and half-inch bar spacing | The VCA suggested minimum of 24 x 24 x 18in is smaller than every mainstream ferret cage sold, so measuring against it would separate nothing. We use bar spacing as the primary filter instead, because a half-inch gap holds a kit that a one-inch gap does not. |
Why we do not publish prices
There is no price anywhere on this site. Every buy link reads "Check price on Amazon" and takes you to the live listing. This is a deliberate editorial position, not an omission.
Prices on small-pet housing move constantly, and a page updated in September carrying an August price is misleading by the time anyone reads it. Competitor pages in this category hard-code figures into body copy — we found one with a specific dollar amount written into a sentence — and those numbers go stale within weeks while the page keeps ranking. Sending you to the live listing is less satisfying to read and more honest.
One practical consequence: we cannot rank products by value for money, because we are not tracking money. Our scores are about specification against threshold. If two cages both clear the floor and one is half the price, the price is your tiebreaker to apply, not ours.
How we make money
We participate in the Amazon Associates program, which means we earn a commission when you buy through a link on this site, at no extra cost to you. Some products we link are not sold on Amazon at all; where we link a brand's own store and earn nothing, the button says so.
Commission does not decide which products clear a welfare threshold. The mechanism that protects that is structural rather than a promise: the floor-area filter is arithmetic against a published figure, it is applied before anything else, and the figure and the arithmetic are both printed on the page. If we let commission move a product up a list, you would be able to see it in the numbers. The full terms are on our affiliate disclosure page.
What would make us drop a recommendation
- Discontinuation or a long stock-out. A recommendation you cannot buy is not a recommendation. These get replaced and the page is re-dated.
- A specification revision that drops the product below a threshold. Manufacturers do quietly change dimensions and bar spacing between production runs. If the published figure changes, our assessment changes with it.
- A safety issue — a recall, a pattern of failures in a specific component, or a spec we got wrong. Corrections are made on the page itself and the page is re-dated, never silently edited to look as though the error was never there.
- A change to a figure we cite. If an issuing body revises a threshold, we update the figure, the citation, and every page that repeats it. That is why the thresholds live in one place in this site's code rather than being typed into 71 pages.
What we will not do
For completeness, and because in this category the absences are as informative as the claims: we do not claim veterinary review, because we have no vet reviewer. We do not publish star ratings or customer review counts, because we hold no first-party rating data. We do not publish testimonials, because we have none that are real. We do not accept payment for a placement in a list. And we do not describe a stock photograph as a picture of our own setup — every illustrative image on this site is labeled as such.
The author of every page here is Ryder M., the owner of Magoo Media Group. That is the whole of the claim being made about who wrote this. The full standards for corrections, sourcing and updates are in our editorial policy.
Questions people ask
Do you test the cages you recommend?
Why is there no price on any product?
Who decides the floor-area figures you measure against?
Does commission change your recommendations?
What happens if you get a specification wrong?
Sources
- PDSA — The ideal home for your hamster — Minimum cage size 100 x 50cm; bedding at least 25cm; wheel at least 30cm Syrian / 20cm dwarf
- San Diego Humane Society — Hamster care — Bedding at least 6in, 8-12in best; wheel 8-10in dwarf / 10-12in Syrian
- RSPCA — Rabbit environment — Living space no smaller than 3m x 2m x 1m for two medium rabbits
- Rabbit Welfare Association & Fund — Minimum space requirements — 3m x 2m x 1m in a single block; platforms and tunnels excluded
- Humane World for Animals — Guinea pig housing requirements — 7.5 sq ft minimum for two, 10.5 sq ft preferred; walls 12in; no wire floors
- VCA Animal Hospitals — Ferrets, housing — Suggested minimum 24 x 24 x 18in; temperature at or below 80F
- House Rabbit Society — The dangers of softwood shavings — Phenols, liver enzyme induction and drug metabolism