A rabbit's nose sits two centimetres above its bedding for most of its life. That is the whole argument for a low-dust litter, and it is a stronger argument here than in any stable.
Hemp shiv is plant fibre with no additives, no oils and nothing aromatic. Small amounts pass through without harm, which cannot be said of every alternative — softwood shavings release phenols, and scented litters are an unnecessary risk in an animal that lives with its face in them.
It is bedding rather than food. It has no nutritional value and should never displace hay, which is what a rabbit or guinea pig actually needs to be eating in quantity all day.
Respiratory trouble is common in rabbits and rodents and hard to treat. Dust-extracted hemp is among the lowest-dust beddings available and the difference is visible when you tip a bag out.
Matters most for guinea pigsAround four times its weight, and it locks ammonia rather than releasing it. A hutch stays fresher between cleans, which usually means it gets cleaned properly rather than often.
Skip daily, change weeklyNo sharp edges and it compresses into a mat. Relevant for rabbits prone to sore hocks, where a hard or wet floor is the usual cause.
Deeper is betterHalf old, half new, then more each clean. Small animals toilet where they toileted yesterday, and a sudden total change is how litter training comes undone.
5–7 cm there, 2–3 cm elsewhere. Rabbits and guinea pigs pick one corner and commit to it, so put the absorbency where the work is.
Bedding is not forage. A hay rack away from the toilet corner keeps the two apart and stops an animal eating soiled hay.
Lift the wet patch and top up. A full change more often than weekly is usually a sign the bedding is too shallow rather than that the animal is messy.
Yes, and it holds a tunnel better than shavings because it compresses. Give a good depth — 15 cm or more for a Syrian — and mix in some plain paper or hay for nesting.
Rabbit and guinea pig waste is cold manure and can go straight onto a heap or even directly round plants. With hemp bedding it composts quickly and makes very good material.
Stop and go back. Hemp is very low dust but no bedding suits every animal, and a sneezing guinea pig needs a vet rather than a second guess — respiratory infections move fast in an animal that size.