Ruffwear Gnawt-a-Rock Dog Toy


Looking like a piece of Obsidian from lava flows, the Gnawt-a-Rock is a dog toy inspired by natural volcanic glass formed by rapidly cooling lava from Pacific Northwest volcanoes (USA).

Unlike the Obsidian, Gnawy-a-Cone is made with natural latex rubber and faceted to facilitate gum massaging. Its irregular shape gives the Rock an erratic bounce and openings, the treat dispensing ability for interactive play and reward. Holds up to 2 cups of kibbles.

Size diamater: 4.5inch (11.5cm)

Should any part of the toy comes loose or detached, remove toy immediately from dog and discard the toy.
Key Features: 

  • Kibble/treat dispensing, internal chamber holds upto to 2 cups of kibbles or  small training treats
  • Made from natural rubber, a sustainable and renewable resouce
  • Erratic bounce for engaging fetch
  • Faceted surface for gum massages
  • Size suitable for large-mouth dogs
  • Made in Vietnam
Washing instructions:
  • Hand wash
  • Top rack dish-washer dafe
  • Dish soap
  • Air dry thoroughly

Watch how it works!



    How to measure your dog

    Take 1 tape measure and 1 dog (and maybe some treats).

    Measure neck size for collars

    Take measurement round the base of neck, with 2 fingers slag (UC). Then choose the collar size to match the measurement.

    (Do not measure old collar.)

    Measure girth for harness / apparel

    Take measurement of the largest part of the chest (LC).

    Girth is slightly behind the fore legs (not at the fore legs, 'arm pits').

    Then choose the gear that matches your measurements.

    Measure torso for apparel

    Measure from the base of the neck to the base of the tail (L).

    Choose the apparel that matches your measurements.


    If you need further help in choosing the right size, please feel free to contact us woof [at]


    We are confident you or your furry family member would be happy with our merchandise and service. We work hard to ensure the quality or the merchandise we present here. If for some reason you are not, we'd be happy for an exchange.

    Merchandise should be in original packing and re-sellable condition, unused and undamaged.  Exchanges should be made within 14 days from date of delivery and please allow 14 days for processing exchanges. Customers are responsible for charges that arise due to exchanges (such as delivery / shipping). Faulty items due to production/manufacturing will either be replaced or refunded as appropriate to the circumstances. Email us at woof [at] with the order number and relevant details.

    We reserve the right to deny any exchanges that do not meet exchange policy.

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