Official U.S. shopBuying
Mighty K9 Batch Verify: How to Check Your Bottle
Lot MK-26/TH-4089 and CoA reference MK-4089-26-TH are seller reference codes, not lab proof. To check a bottle, look for an unbroken seal, a lot number and a best-before date if one is printed, amber glass, and oil that smells mild and looks clear golden-green. To match an order, call +1 (302) 200-3480 with your order ID.
Written by the Mighty K9 editorial teamUpdated
The codes
What do the Mighty K9 lot and CoA numbers mean?
They are reference codes the seller uses to identify a batch. They are not a lab report, and they do not prove what is in the bottle.
A real certificate of analysis (CoA) is a dated document from a lab, showing what was tested, the method and the results. We have not seen such a document for Mighty K9. The two codes below help the order desk find a batch record when you call.
| Code | Value | What it is | What it is not |
|---|---|---|---|
| Lot | MK-26/TH-4089 | Seller batch reference | Proof of contents |
| CoA reference | MK-4089-26-TH | A file number to ask about | A published lab result |
| Best-before date | On the bottle, if shown | Freshness guide for the oil | A safety guarantee |
| Third-party lab report | Not published | The real proof of C60 amount | Something we can show |
Why does proof matter? Tested commercial C60 oils have ranged from 0.57 to 1.4 mg/mL (Grohn et al., 2021). More on that on the testing and quality page.
Bottle check
How do I check my Mighty K9 bottle?
Four checks, about two minutes, before the first serving.
- 01
Check the seal
Before you open it, make sure the cap seal is whole and the dropper is not loose or sticky.
- 02
Find the codes
Look for a lot number and, if the bottle shows one, a best-before date. Photograph them.
- 03
Smell and look
Fresh olive oil smells mild and fruity. A sour, paint-like or rancid smell means do not use it.
- 04
Match the order
Call the order desk with your order ID and the lot you see. Keep the box until you are done.
Good vs bad
What should a good bottle of Mighty K9 look like?
A good bottle is sealed, made of amber glass, full to the shoulder and labeled cleanly. The oil inside should look like ordinary extra virgin olive oil.
Keep it
- Amber glass, cap seal intact
- Cream label with the brown Mighty K9 wordmark
- Front reads Organic Extra Virgin Olive Oil · Contains 100% ESS60® · Bacon Flavor · Net Wt. 2 fl oz (60 mL)
- Clear golden-green oil, mild smell, light bacon note
Do not use it
- Clear plastic or a broken seal
- Smudged, missing or reprinted label
- Cloudy oil, dark sludge, or a sharp, sour or rancid smell
- Low fill or oil leaking around the cap
Cold oil can turn a little cloudy and clear again at room temperature. That alone is normal.
Pack shot
Why is Mighty K9 sold in amber glass?
Amber glass cuts the light reaching the oil. That matters because C60 in olive oil left in strong light for 4-8 days killed 25-50% of mice in the Grohn study (Grohn et al., 2021).
The label says "Store in a cool and dark place." Keep the cap closed and the bottle in a cupboard, away from a sunny window. Never pour it into a clear dropper or jar.
Your order
How do I match my Mighty K9 order to my bottle?
Call the order desk at +1 (302) 200-3480 with your order ID. The desk can see your order and can note the lot you received.
- Have the order ID from your confirmation email.
- Read out the lot and any best-before date from each bottle.
- Ask whether a CoA for reference MK-4089-26-TH can be emailed to you.
- Write down the name of the person you spoke to and the date.
The website inbox, [email protected], cannot see orders. For tracking, see shipping.
Records
What should I keep from each Mighty K9 order?
Keep the order email, the box and a photo of each bottle's lot until the last bottle is used. Those three things make a refund, a batch question or an FDA report quick.
- Delivery day
Photograph the box, the seals and every lot number. Check each bottle, not just the first.
- First serving
Write the start date on the label with a marker. Smell the oil once more.
- Each new bottle
Repeat the smell and seal check. A 3-bottle order covers about 90 days, so the last bottle sits the longest.
- Day 30
The guarantee window closes. Decide before then whether the product suits your dog; see the guarantee details.
A small note in your phone with the order ID, lot numbers and start dates is enough. Your vet will find the same notes useful if your dog has any reaction.
Problems
What if my Mighty K9 bottle looks wrong?
Do not give it to your dog. Take photos of the bottle, the seal, the label and the box, then call +1 (302) 200-3480 with your order ID.
Keep the bottle and packaging. If you return it, the sales page shows a 30-day money-back guarantee that includes empty bottles; Buyer pays return shipping. Use a tracked service. Details are in the refund policy.
Reporting
How do I report a bad batch of Mighty K9?
If your dog got sick or the product seems unsafe, report it to the FDA Safety Reporting Portal. Include the lot number, best-by date, where you bought it, your dog's signs and your vet records, and keep the packaging (FDA, Report a pet product).
Vomiting, a painful belly or refusing food after a serving needs a vet the same day. See side effects for warning signs.
Pet supplements get no FDA review before sale (FDA, Pet food rules), so reports from owners help the agency spot a pattern across batches.
FAQ
Mighty K9 batch and bottle FAQ
How do I know if my Mighty K9 is real?
Check for amber glass, an intact seal, the cream label with the brown wordmark and the bottle-front wording, and oil that looks and smells like fresh olive oil. Then call +1 (302) 200-3480 with your order ID so the order desk can match your order.
What is lot MK-26/TH-4089 on Mighty K9?
It is a seller reference code for a batch. It helps the order desk find a record when you call. It is not a lab result and does not prove what is in the bottle. Read the lot printed on your own bottle and give it when you call.
Does Mighty K9 have a certificate of analysis?
The seller lists a CoA reference, MK-4089-26-TH, but we have not seen a published lab certificate. A real CoA names the lab, the test date, the methods and the results. Ask the order desk or the maker to email one for your lot.
Where is the lot number on a Mighty K9 bottle?
Lot numbers and dates are usually printed on the label edge, the bottom of the bottle or the box. If you cannot find one, take photos of all sides and ask the order desk. Note any best-before date the bottle shows.
Does Mighty K9 expire?
Olive oil goes stale over time, and the label asks you to store it in a cool and dark place. Use the best-before date if the bottle shows one. At 2 mL a day a bottle lasts 30 days, so an opened bottle should not sit for long.
What does rancid Mighty K9 smell like?
Rancid olive oil smells sour, waxy, like old nuts or crayons, or like paint. Fresh oil smells mild and fruity, here with a light bacon note. If the oil smells off or looks dark and cloudy at room temperature, do not use it.
Can I get a refund if my Mighty K9 bottle is damaged?
Call +1 (302) 200-3480 with your order ID and photos of the damage. The sales page shows a 30-day money-back guarantee that includes empty bottles, with return shipping paid by the buyer. Keep the bottle and box until the order desk tells you what to do.
Who wrote this
Written and reviewed by
Plain-language pages built from the label panel, the sales page and linked veterinary and public sources.
Last updated . Both our editorial standards and how we check reviews are open to read. This website is run by Themightyk9, the Mighty K9 U.S. shop and a stocking partner, not by the manufacturer. Buying through our order links earns us money.
Keep reading
More about Mighty K9
Testing & quality
What the GMP, Made in USA and organic claims mean, what lab proof is missing, and what to ask the maker.
Read more
Shipping
How Mighty K9 ships, what shipping costs, how to track an order and what to do if a bottle arrives damaged.
Read more
Refund policy
The formal Mighty K9 refund policy: eligibility, return address, required details, timing, damaged items and chargebacks.
Read moreMighty K9 U.S. shop, a stocking partner
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