Ruffwear | Gnawt-a-Rock™


It looks like a piece of Obsidian from our nearby lava flows, but it’s Gnawt-a-Rock™! This durable throw toy is inspired by natural volcanic glass formed by rapidly cooling lava from Pacific Northwest volcanoes.

Unlike Obsidian, the Gnawt-a-Rock is made with natural latex rubber, with a faceted, gum-massaging surface. Its irregular shape creates an erratic bounce, and it has a treat-dispensing design for interactive play and reward.

Part of the Pacific Gnaw-west toy collection inspired by Ruffwear’s home of Bend, Oregon, and its natural surroundings.

Diameter: 4.5 (in), 11.5 (cm), Holds up to 2 cups of kibble.


  • Erratic bounce for engaging fetch.
  • Faceted surface for gum-massaging.
  • Size suitable for large-mouthed dogs.
  • Made from natural rubber, a renewable, sustainable resource.
  • Made in Vietnam.


  • Top rack dishwasher safe.
  • Dish soap.
  • Air dry.

Note: If any part of this toy becomes loose or detached, immediately take the toy away from the dog and discard the toy.