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)

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


Key Features

Additional Features

  • 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

Washing Instructions

  • Top rack dishwasher safe
  • Dish soap
  • Air dry

Trail Tested Promise

All of our products are rigorously field tested and we proudly guarantee against defects in materials and craftsmanship.

Great Companions

Ratings & Reviews

Customer Reviews

4.8 Based on 34 reviews
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  • Henry
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  • rock
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  • Tucker
  • food toy
  • Border Collie
Braden W.
United States

My dog loves It!

I have a massive labradane and this is the best toy he has. He hasn’t been able to tear this to pieces which is unique itself. The food dispensing aspect is also great for him. Great toy.

Fran J.
United States

Great toy for ball chasers!

I thought this one would be ruined first by my dogs, but they have had a great time with it! Pretty tough toy!

Amber R.
United States

My Dog loves this!

My akita, Aegon, is VERY picky about enrichment toys. This has been the bane of my existence for his almost two years because of course he is also very active. Which is great. He is my Service Dog, so having a way to entertain him, enrich his life, and tire him out on bad days is super important to me. We've tried other puzzle toys before, but he absolutely LOVES his Gwnat-a-Rock! He'll kick it around forever even after it's run out of kibble. I love the irregular shape and the way it makes him think.

Amber R. verified customer review of Gnawt-a-Rock™
Jim L.
United States

Love it

My chocolate lab Henry loves the rock. He loves it so much I had to buy another one. Now we have yellow and blue. Keeps Henry busy. Thank you.

Linda G.
United States


Tucker is happy playing with this. Tucker, who is 11yrs only likes treat toys & this is a great one.

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