Mighty K9 U.S. shop, a stocking partner2 mL a day · 30 servings per bottleFree U.S. shipping over $10030-day money-back, empty bottles too
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For owners who want a safety net

Mighty K9 Money-Back Guarantee: Is It 30 or 60 Days, and How to Get a Refund

Quick answer

Mighty K9's money-back guarantee is 30 days long, not 60, and empty bottles count. You pay the return postage. To use it, phone +1 (302) 200-3480 with your order ID, then post the bottles with a note of your name, email and order ID.

Written by the Mighty K9 editorial teamMedically reviewed by Dr. Aimee Duffy, MD, PhysicianReviewed · Updated · 5 min read

A corgi and a terrier walking a trail at sunset, with a Mighty K9 bottle in the corner
Read the refund terms on day 1, not on day 29.

Key facts at a glance

Key facts
  • Guarantee length: 30 days. A 60-day guarantee is not listed anywhere we checked.
  • Empty bottles are included. Return shipping is not.
  • To claim: call +1 (302) 200-3480 with your order ID.
  • Return address: 1700 Broadway, Floor 28, New York, NY 10019, USA.
  • Refund timing: 3 to 5 business days after the bottles are credited, then 5 to 10 days for your card.
  • It is a refund rule for buyers, not a results promise for your dog.

What is the Mighty K9 money-back guarantee?

The sales page describes a 30-day money-back guarantee that counts empty bottles. In practice, you can use up the drops and still ask for a refund.

You pay the postage to send bottles back, so a tracked service is the sensible choice. The order desk, which can see your order, starts the refund and handles the rest.

Green and gold seal reading Our 30-Day Empty Bottle Guarantee
The brand's guarantee seal. It states a purchase policy, and says nothing about whether the drops will work.

Is there a 60-day guarantee?

Some searches ask for a 60-day guarantee. We did not find one. Everything we checked says 30 days: the sales page, the product page and the policy pages on this site.

If you see 60 days on another page, treat it as unconfirmed. Ask the order desk in writing before you rely on it. The number that counts is the one on your own order page and confirmation email.

What does the guarantee cover?

Cover under the guarantee, per the sales page on October 11, 2026
ItemCovered?Note
Sealed bottlesYesPost them back with the rest of the order
Part-used bottlesYesTighten the dropper before packing
Empty bottlesYesNamed in the sales page terms
Return postageNoYou pay; choose a tracked service
Requests after day 30Not statedCall anyway, but do not rely on it
Marketplace or reseller purchasesNot confirmedThe desk sees only official orders
Mighty K9 amber dropper bottle with a spaniel on the cream label

Want the terms next to the price?A 30-day money-back policy with empty bottles included. Return shipping is not.

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How do I claim a Mighty K9 refund?

  1. Get your order ID

    Find it in the confirmation email, and hold on to that email until the refund lands.

  2. Phone the order desk

    Call +1 (302) 200-3480 and say you wish to use the 30-day guarantee. The sales email, [email protected], also answers order questions.

  3. Pack every bottle

    Send full, part-used and empty bottles. Tighten the droppers and pad the glass.

  4. Post it with tracking

    Note the tracking number. It proves the parcel arrived.

A claim emailed to [email protected] will go nowhere, since that inbox serves the website and has no view of orders.

Where do I mail the bottles?

Send returns to 1700 Broadway, Floor 28, New York, NY 10019, USA, with a note giving your full name, email and order ID so the parcel can be matched. A box with no slip can sit unmatched.

Our office on Madison Avenue is a different place and does not take returns. Use the Broadway address unless the desk tells you otherwise on the phone.

When will my refund arrive?

Plan on 3 to 5 business days after the returned bottles are credited, then 5 to 10 days more for your card issuer to post the money. The clock runs from the day the bottles are logged, not the day you post them, so tracking is worth having.

The money goes back to the card or method you paid with. If two weeks pass after delivery with no refund email, call the order desk and quote your order ID and tracking number.

Is 30 days long enough to judge Mighty K9?

Probably not, judged by the brand's own timeline. The sales page puts full results at weeks 8 to 12, yet the window shuts at 30 days.

  1. Day 1

    Order, and keep the email. Record how your dog gets up, takes stairs and walks.

  2. Day 10

    Check in. Repeat the same notes on the same weekday.

  3. Day 20

    Decide. If it is not working out, call now, while there is time to post the bottles.

  4. Day 30

    The window shuts. Call before it does.

Joint changes have many causes. If your dog limps, cries out or struggles to rise, see a vet, whatever you decide about the drops.

What if a bottle arrives damaged or wrong?

Call the order desk as soon as you open the box, and keep the bottle, the packaging and photos until you are told what to do. Chipped glass or a broken seal may mean unsafe oil, so keep it from your dog.

No separate damaged-goods policy is published. Note the lot code on the label, since the desk will ask.

What should you write down before you use the guarantee?

  • Your order ID and the date you ordered.
  • The date the box arrived, and a photo of each bottle's lot.
  • How many servings are left in each bottle.
  • Your dog's weekly scores and weight, if you kept a log.
  • The name of each person you spoke to, and the date of the call.

Whether day one is the order date or the delivery date is not stated. Count from the order date.

What does the guarantee not promise?

This is a refund rule, not a results promise. It lets you recover your money inside 30 days; it does not say the drops will change how your dog moves, and no study has tested the product for joints (PubMed search, C60 and dogs).

Not every order is covered either. Purchases made in the brand's own store, mighty-k9.com, follow that store's process, which begins with an emailed request for a return authorization number.

Which sources does this article use?

Every outside source this article cites is listed here. Product facts come from the label panel and the product page, as printed on this site.

  1. PubMed search: (fullerene* OR C60) AND (dog OR dogs OR canine). National Library of Medicine, searched October 11, 2026.

Frequently asked questions

Does Mighty K9 have a money-back guarantee?

Yes: 30 days, with empty bottles accepted, as shown on the sales page. Return postage is not covered.

Is the Mighty K9 guarantee 60 days?

No. Everything we checked says 30 days. If you see 60 days elsewhere, treat it as unconfirmed and ask the order desk.

Can I return empty Mighty K9 bottles?

Yes. Empty bottles are accepted. Post back every bottle from the order, with a note giving your full name, email and order ID.

Who pays return shipping?

You do. Return postage sits outside the guarantee, so use a tracked service and keep the number.

How do I claim a refund?

Phone +1 (302) 200-3480 inside the 30 days and give your order ID, then post the bottles to the New York returns address.

How long does the refund take?

The refund goes out 3 to 5 business days after the bottles are credited to you, and your card issuer may need another 5 to 10 days.

Our view

Our view: the guarantee is a real point in the buyer's favor, mostly because empty bottles count. The weak spot is the length. Thirty days is shorter than the brand's own results timeline.

Save the order email, mark day 20 in your phone, and make your money decision then. Take health decisions to your vet.

Mighty K9 amber dropper bottle with a spaniel on the cream label

Want to see the terms at checkout?30 days, empty bottles included. You pay the return postage.

See today's price and guarantee

We earn money when you order through this button. The order page shows the final price before you pay.

Safety and your vet

Mighty K9 is not FDA approved, and no dog supplement is. It is not intended to diagnose, treat, cure or prevent any disease. Talk to your vet about any health question. Limping, pain or stiffness that does not ease needs a vet exam, not just a supplement. Ask your vet first if your dog is under 6 months, has had pancreatitis or needs a low-fat diet, is pregnant or nursing, takes any medicine, or is being treated for a condition.

Keep reading: Subscription and cancel order · Before and after: results timeline · Mighty K9 price

Last updated . Written by the Mighty K9 editorial team. Medically reviewed by Dr. Aimee Duffy, MD, Physician on .

Mighty K9 amber dropper bottle

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