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Ultimate Marrow™ Chew Bone


Sporn® Durable Marrow™ Chews are the only chewable nylon bones with “Jerky Flavor Down the Middle!” Perfect for power chewers, the ULTIMATE chew has multiple textures, ridges and zigzags that help remove tartar from the dog’s teeth. Unlike traditional rawhide bones, the Ultimate Marrow™ Chew Bone will last!

Use code: 10OFFSPORN at Amazon checkout to get an extra 10% OFF YOUR ORDER!

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Unleash the Challenge: The Ultimate Chew

Meet the Sporn Ultimate Marrow Chew, a creation born out of genius minds and active, hard-chewing dogs. It not only retains the appealing jerky flavor in its marrow, it also presents an additional challenge to your furry friend – the quest for the unbreakable. This unique chew toy is more than just a treat; it's an intriguing game that keeps dogs engaged for hours on end. Let your pets relish the savory flavor and take on the challenge today!

The Invincible Chew Toy

The key to the Sporn Ultimate Marrow Chew's indestructibility lies in its innovative design. The bone is coated with a layer of dimpled latex rubber, creating a sturdy barrier that can withstand even the mightiest molar power. This daring design turns chew time into a captivating challenge, daring large dogs to flex their jaws and try, try as they might, to break it in half.

Fun with Sporn: Join the Challenge

To spice things up, we've added an extra layer of excitement: a challenge. Any dog caught on video successfully breaking the Sporn Ultimate Marrow Chew in half wins $100 worth of free Sporn products. Not only does this toy deliver hours of playtime for your pet, it also brings joy and excitement for you, as you watch them take on the impossible task. The Sporn Ultimate Marrow Chew: turning chew time into a thrilling event! Dimensions: 6.5" length, 2.75" width,  2" depth Recommended for medium to x-large dog breeds, or dogs weighing over 40 pounds. Composition: Nylon (81.16%), Natural Rubber (17.90%), and TPR (.94%). Precautions: Please monitor your dog for safe chewing at all times. Although MarrowChews are non-toxic, they are not intended for consumption. If any tiny pieces are ingested, they should pass safely; there is no need for concern. Discard bone if it appears a larger piece could break off. Larger chunks may not pass safely if ingested. Videos:
Hand wash harness in warm soapy water. Rinse and air Dry.

All domestic orders are shipped in recyclable cardboard. A tracking number with shipment details will be emailed from within 48 business hours of order departure. Please allow adequate time for your order delivery based on a departure in California.

Orders are processed from 9:00am- 6:00pm Central Time, Monday through Friday (with the exception of major holidays). Current order processing times are 2-4 business days.


All Sporn products as of August 2023 will carry a 1 year limited warranty.

Coverage Period: 1 year from the date of purchase

Covered Components: The entire product, including all parts and accessories

Covered Issues: This warranty covers defects in materials or workmanship that result in malfunctions or failures of the product under normal use.

Resolution Options: In the event of a covered issue, the manufacturer or seller will provide one of the following at their discretion: repair of the product, replacement of the product or parts, or a refund of the original purchase price.

Limitations and Exclusions: This warranty does not cover damages caused by unsupervised dog chewing, use of the product in a manner other than indicated on the packaging, or damages resulting from accidents, misuse, or unauthorized repairs. Each purchased item with a valid receipt is limited to a one time warranty claim, and an already replaced item will not be eligible for another replacement.

Transferability: This warranty is non-transferable and is applicable only to the original purchaser.

Claim Process: To make a warranty claim, the customer must send an email to, including the receipt of purchase and a clear picture of the broken product. We cannot process a claim without the receipt. The manufacturer or seller will review the claim and provide further instructions for resolution.

Returns & Exchanges

If you are unsatisfied with your product and wish to return it for an exchange or refund, please email us at for instructions on how to do so. Refunds are only provided for items ordered directly from to USA and Canadian residents, and must be initiated within 30 days of purchase order. Please note that we do not pay return postage and we do not refund original shipping costs. Sporn is not liable for any missing packages so a tracking number for your return is highly recommended.

Please email us at with any return inquiries before mailing your return and we will provide the returns address.

Please include a note, along with the actual product, providing all the following details:

  • Name
  • Telephone number and email address
  • Return mailing address (no PO boxes please)
  • Brief description and picture of defect (if any)
  • QC code needed for replacement orders (White tag that says QC followed by a few digits)
  • If you are seeking a replacement or refund

Any returns sent back to the ship from address rather than the returns department address provided in the email correspondence will be subject to a restocking fee of $8.75.

Cancellation Policy

A 1 hour timeframe from the purchased time is given for customers to cancel their order. Please send an email to, with subject line titled “Order # Cancellation.” Please note that orders are processed on a timely basis, and we may not honor cancellations if the order has already been shipped out.

4 reviews for Ultimate Marrow™ Chew Bone


Reviewed by 04 customer(s)

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    I bought a small bone for my jack russell today, normally she chews on anything she can find that isn’t packed away but since I got her this, she hasn’t touch a single thing except the bone! She carries it around the house and it’s also making her chew with her back teeth which is a desperate need. She can normally bite through dental chews really quickly so this is great all around.

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    Brilliant product
    Our Jack Russell absolutely adores Sporn Chew Bones. He is a big chewer, being a terrier, and we’ve had to get him the next size up as he went through the smaller size very quickly. We have been walking on many occasions with the chew bone as he won’t leave home without it! Great job, guys

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    My dog loves it!
    This bone has served my 1yo golden retriever cross very well. He chews on it everyday when he’s bored, and its been going for 6 months strong now. Excellent boredom buster!

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    Rynda Westendorf

    XLarge Marrow Chew Bone
    Love this bone. I bought the XLarge Marrow Chew Bone for our 7 month old Anatolian Shephard (100#) in October 2019. It is now February 2020 and this bone has survived his super chewer jaws! He has chewed it down to about half and it’s time to replace. We’ve never had any toy or bone last more than a week…I am super happy with this bone and its quality.


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