A Hound's Tooth is a resource that is obtained by killing Hounds, Red Hounds, and Blue Hounds. Hound Mounds, once destroyed, will also drop three Hounds' Teeth. This item can be used to craft a Dapper Vest, Blow Dart, Sewing Kit, and Tooth Trap.
Aside from waiting for periodic Hound attacks, the only way to acquire Hounds' Teeth is by visiting a Walrus Camp (in Winter) or a Hound Mound and fighting the Hounds and Blue Hounds that spawn. This can be extremely dangerous and should not be attempted unless adequately prepared.
In the Reign of Giants DLC Hound's Teeth can sometimes also be obtained by destroying Tumbleweed and hammering Bones. Another method to get Hound's Teeth is to track and kill a Varg (also known as a Warg). The player can find a Varg by tracking down a Koalefant. However, tracking a Varg can be difficult as there is only a 5% chance on day 1, which increases over time to 33% chance on day 100.
In the Shipwrecked DLC, Sea Hounds also have a chance to drop Hound's Teeth. Sea Hounds replace Hounds when the player is on the Ocean during periodic Hound attacks. Unlike Hound attacks, Sea Hound attacks can also be triggered by player actions. They have a chance to spawn when meat or fish food items are dropped on the Ocean. They can also spawn after Fishing in a Shoal.
- According to Wickerbottom, Hound's Teeth contain brimstone, also known as sulfur. In folklore, sulfur is often associated with demons, implying that the in-game Hounds are Hellhounds.