Blackdog Shark Cartilage is a natural chew treat made in Australia from shark spine cartilage, suitable for dogs of all sizes. It's a single-ingredient treat with a firm, chewy texture that gives dogs something to work on — useful as a longer-lasting reward or an occasional joint-support snack.

Shark cartilage is a natural source of glucosamine and chondroitin, the two compounds most commonly associated with cartilage and joint health. The cartilage is salvaged from sharks harvested for the food industry, so nothing is wasted. There are no added preservatives, colours, or flavours — the treat is exactly what it says on the pack.

Owners pick these for dogs starting to show stiffness or for breeds prone to joint issues, and as a change from the usual meat-based chews. The chew time is decent for the size, which makes them satisfying rather than gone in a second.