Carefresh Small Animal Bedding, 60L

Why bedding choice is a respiratory decision

Small pets live with their faces in their bedding. Rabbits, guinea pigs, hamsters, gerbils and rats all have sensitive respiratory tracts, and the two things that damage them are dust and volatile compounds.

That is the reason the fishkeeping-style advice about "any wood shavings will do" is out of date. Untreated pine and cedar shavings release aromatic oils — cedar most strongly — which are implicated in respiratory irritation and liver enzyme changes in small mammals. Kiln-dried pine has most of the volatiles driven off and is widely used safely; cedar is the one to avoid outright.

Paper bedding sidesteps the question entirely. Carefresh is reclaimed paper fibre, and its selling point is that it has no aromatic oils to release and very little dust to inhale.

Absorption is the number that matters

Carefresh publishes roughly three times its weight in liquid absorbed, and absorption is what actually drives cage hygiene. Ammonia is the enemy in a small-pet cage: urine sitting on a non-absorbent surface off-gasses ammonia, and ammonia is both the smell you notice and the irritant that damages your animal's airways.

A bedding that pulls liquid down and away from the surface keeps the animal out of contact with it and slows the ammonia. That is the mechanism behind the odour-control claim, and it is why depth matters as much as brand.

Depth: the thing people get wrong

Most people use too little bedding. A thin scatter looks tidy and fails at everything bedding is for.

Hamsters and gerbils in particular are burrowing animals, and a shallow layer denies them a natural behaviour that matters for their welfare. If you are buying a 60-litre bag, that is not excessive — it is roughly what a properly bedded hamster enclosure uses.

Paper bedding does not hold a burrow as well as a deep layer of kiln-dried shavings or a shavings/paper mix. If you keep a heavy burrower, mixing paper with kiln-dried shavings or adding hay gives the tunnels structure.

The "kicked out of the cage" problem

Light paper bedding travels. Wheels fling it, hamsters kick it, and a wire cage with a shallow base leaves a halo of bedding on your floor.

The fix is the cage, not the bedding: a deep base tray, a bin cage, or an acrylic guard around the lower bars. Any light bedding does this, so it is not a reason to switch brands.

Spot-clean, do not strip

The single best hygiene practice for small pets is daily spot-cleaning of the wet corner and a partial rather than total change.

Stripping a cage completely removes every familiar scent marker. Hamsters and gerbils respond by scent-marking frantically and, in some cases, by becoming stressed and defensive. Keep a handful of clean used bedding and the nest when you do a full change, and the animal settles again much faster.

A guinea pig or rabbit needs more frequent full changes than a hamster, simply because of output volume.

Colour and staining

Coloured versions are dyed, and the dye can transfer to light-coloured fur, particularly when damp. It washes out and is not harmful, but if you keep a white long-haired animal and want to see health changes in their coat, the plain natural version is the sensible choice. Being able to see the colour of urine on plain bedding is genuinely useful — urine changes are an early sign of problems in guinea pigs and rabbits.

What it does not replace

Bedding is not hay. Guinea pigs and rabbits need unlimited grass hay as the bulk of their diet, and the hay they eat is separate from the bedding they sit on. Feeding bedding-grade material or letting hay serve as the only substrate are both common and both wrong.