Two carrot gnaw stones layered between three wooden chew discs, threaded onto a cord so the whole stack can be tied to the bars of a cage or hutch. The stones are baked natural loam with chopped wheat stalks, Jerusalem artichoke and spirulina worked through, and carrot pressed into the surface before the loam dries.

The composition is refreshingly blunt: clay 62%, wood 36%, dried carrot 2%. That tells you what this is for. It is not food, it is a mineral-rich object hard enough to wear teeth down, with just enough carrot on the outside to make a rabbit start. Hanging it rather than leaving it loose is the difference between a gnaw and a litter tray ornament, because anything on the floor gets soiled and ignored.

• Clay 62%, wood 36%, dried carrot 2%
• Baked loam with chopped wheat stalks, Jerusalem artichoke and spirulina
• Two stones and three wooden discs on a natural hanging cord
• Suited to rabbits, guinea pigs, chinchillas and gerbils

Ninety-eight percent of this is clay and wood, so it will not tempt a fussy animal. The carrot is a 2% surface coating and once it has been licked off, some rabbits lose interest entirely and others chew the stack down over weeks. It is worth knowing before you buy that a gnaw stone is a slow-burn enrichment object, not a treat, and a rabbit that ignores it is not doing anything wrong.

Who it's for: a rabbit, guinea pig or chinchilla that needs something hard to work on and a cage that has somewhere to hang it. Good for chinchillas and degus in particular, since there is almost no sugar or starch in it.