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How to Read a Dog Supplement Label, Line by Line
Read the guaranteed analysis, the ingredient list, any footnotes, the calorie statement, the directions and the lot code. On Mighty K9 that means 2 mL servings, 100% crude fat, 1.6 mg of ESS60, 16.2 kcal and three ingredients. Then check the claims: words that promise to treat a disease make a product a drug in the eyes of the law.
Written by the Mighty K9 editorial teamUpdated · 9 min read
Start here
What should I look for on a dog supplement label?
Check six things, listed below, then read the claims with a skeptical eye.
No one checks pet supplements before sale. FDA does not pre-approve pet foods (FDA, Pet Food), and the human supplement law, DSHEA, does not cover animal products (AVMA, Assessing pet supplements).
Our example is the Mighty K9 label. Three ingredients make it easy to check, a real point in its favor.
- Serving size and servings per container
- Guaranteed analysis and any footnote marks
- Ingredient list, in order
- Calorie content
- Directions, warnings and storage
- Lot number and best-by date
Tap through it
What does each line of the Mighty K9 label mean?
The panel covers one 2 mL serving. The bottle holds 30.
Tap a number to read what that line of the label means.
- Brand
MIGHTY-K9 Canine Supplements, the brand name printed at the top of the label.
- Label art
A spaniel resting its chin on the panel. The same face is on the bottle.
- Serving and servings
Per 2 mL serving; servings per container 30. One bottle lasts 30 days at one serving a day.
- Crude protein (min) 0%
There is no protein. It is an oil, not a food or treat with nutrients beyond fat.
- Crude fat (min) 100%
Every drop is fat. That is why one serving carries 16.2 kcal.
- Crude fiber (max) 0%
No fiber, as expected for a pure oil.
- Moisture (max) <0.1%
Almost no water, which helps an oil keep.
- ESS60 1.6 mg
The only ingredient with an amount: 1.6 mg of ESS60 (C60) in each 2 mL, or 0.8 mg per mL.
- AAFCO footnote
“Not recognized as an essential nutrient by the AAFCO Dog Food Nutrient Profiles.” ESS60 is not a nutrient dogs need.
- Calorie content
8,100 kcal ME/kg; 16.2 kcal ME per 2 mL serving. Count it with treats.
- Ingredients
Extra Virgin Olive Oil, ESS60 and Bacon Flavor, in that order.
The numbers
What does guaranteed analysis mean on a dog supplement?
It is a set of minimums and maximums, not an exact recipe. AAFCO requires a minimum for crude protein and fat and a maximum for crude fiber and moisture (AAFCO, Reading Labels).
| Line | Label value | What it tells you |
|---|---|---|
| Crude Protein (Min) | 0% | No protein. It adds nothing to the meal's protein. |
| Crude Fat (Min) | 100% | All fat. That drives the calorie count. |
| Crude Fiber (Max) | 0% | No fiber, as expected for an oil. |
| Moisture (Max) | under 0.1% | Almost no water. |
| ESS60* | 1.6 mg | The one active amount, or 0.8 mg per mL. |
A printed amount lets you compare: 1.6 mg in a 10 kg dog is 0.16 mg per kg, about 9% of the 1.7 mg/kg dose in the 2012 rat study (Baati et al., 2012). Our guaranteed analysis page goes deeper.
Ingredients
Why does ingredient order and the word flavor matter?
Ingredients appear from most to least by weight, and flavor words follow their own rule (AAFCO, Reading Labels). Mighty K9 lists: Extra Virgin Olive Oil, ESS60 and Bacon Flavor. Olive oil first fits a product that is nearly all oil.
Under AAFCO, a named flavor such as bacon flavor only needs an ingredient that gives that taste (AAFCO, Reading Labels).
Mighty K9 does not say what its bacon flavor is made from. Dogs with food allergies: ask the seller first. See our bacon flavor page.
Check the front against the list too. It says "Contains 100% ESS60." That means the C60 used is the ESS60 brand (USPTO via Justia, ESS60). It does not mean the bottle is 100% ESS60: there is 1.6 mg in each 2 mL.
The asterisk
What does "not recognized as an essential nutrient" mean?
It means dogs do not need that ingredient in their diet. The Mighty K9 label puts an asterisk by ESS60 and adds: "Not recognized as an essential nutrient by the AAFCO Dog Food Nutrient Profiles."
It is not a warning of harm. It tells you ESS60 is an extra, not a vitamin or mineral.
Ask what evidence shows a starred ingredient helps dogs. For ESS60 it is thin. The only dog data is 6 beagles fed a different C60 oil for 9 days, with no control group (Hui et al., 2023).
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Order nowCalories
Where are the calories on a dog supplement label?
Look for "Calorie content (calculated)." Mighty K9 prints 8,100 kcal ME/kg and 16.2 kcal ME per 2 mL serving. ME means metabolizable energy.
WSAVA advises keeping treats and extras under 10% of daily calories (WSAVA, Feeding treats). One serving uses about a third of a 10 kg dog's treat budget. Our post on dog supplement calories shows the math for each size.
Seals
Does a dog supplement need an NASC seal?
No law requires it, but the NASC Quality Seal means something. To show it, a company must pass an independent quality audit, keep a complaint system, follow labeling rules and run random lab tests of label claims (NASC, Quality Seal). The seal covers quality and labeling. It does not show that a product works.
Mighty K9 shows no NASC seal. It does show brand badges: a red GMP roundel with no certifier or audit named, and a blue "Manufacture in USA" roundel. The olive oil's origin is not printed.
- A badge with no named issuer is a brand graphic.
- Ask the seller for a certificate of analysis. None is published for Mighty K9.
More on this in our testing and quality page.
Small print
Where are the lot number, best-by date and directions?
Keep the lot code and best-by date. FDA asks for the lot number and best-by date if you report a problem (FDA, Report a Pet Food Complaint).
Mighty K9's lot MK-26/MY-8762 and CoA reference MK-8762-26-MY are seller codes, not lab proof.
The directions, from the brand's product page: "Measure 2 mL and drizzle directly over your dog's meal. Mix into food." The warnings read: "For canine use only. Keep out of reach of children and animals. In case of accidental overdose, contact a health professional immediately." Store it in a cool, dark place. That matters for C60, which breaks down in light (Grohn et al., 2021).
Red flags
Which label claims make a dog supplement a drug?
Any claim to diagnose, treat, mitigate or prevent a disease. Under the law, intended use decides it, and marketing words count (FDA, Unapproved Animal Drugs). A product sold that way needs FDA approval as an animal drug.
Watch the disease words
Arthritis, dysplasia, cancer or pain named as something the product fixes is a drug claim.
Read comfort words with care
"Joint comfort" and "easier movement," as on the Mighty K9 sales page, are not drug claims. They are also not proof.
Report problems
Use Form FDA 1932a, emailed to [email protected], or call 1-888-FDA-VETS (FDA, Report Animal Drug Side Effects).
FAQ
Reading dog supplement labels: common questions
What is guaranteed analysis on dog supplements?
Guaranteed analysis lists minimum crude protein and fat and maximum crude fiber and moisture, as AAFCO requires. It is a set of limits, not an exact recipe. Mighty K9's panel shows 0% protein, 100% fat, 0% fiber, under 0.1% moisture and 1.6 mg of ESS60 per 2 mL.
Does bacon flavor mean there is bacon in it?
Not necessarily. Under AAFCO's flavor rule, a product can say bacon flavor as long as one ingredient gives that taste, with no set amount of bacon. Mighty K9 does not list its flavor source, so ask the seller if your dog has a food allergy.
Are dog supplements regulated by the FDA?
Not before sale. FDA does not pre-approve pet foods, and the human supplement law does not cover animal products. Labels must be truthful, and a product sold to treat or prevent disease is legally an animal drug.
What does a NASC seal tell you about a dog supplement?
The NASC Quality Seal means the company passed an independent quality audit and follows labeling, complaint and testing rules. It covers quality, not whether the product works. Mighty K9 does not show an NASC seal; its GMP badge names no certifier.
What does "not an essential nutrient" mean on a dog label?
It means dogs do not need that ingredient in their diet. On Mighty K9 the footnote applies to ESS60. It is not a warning of harm; it marks ESS60 as an extra, not a vitamin or mineral your dog requires.
Who do I tell if a dog supplement causes a bad reaction?
Report it to FDA on Form 1932a, emailed to [email protected], or call 1-888-FDA-VETS. Keep the bottle, box, lot number and best-by date. If your dog may have swallowed too much, call your vet or ASPCA Animal Poison Control at (888) 426-4435.
Who wrote this
Written and reviewed by
Plain-language pages built from the label, the sales page and linked veterinary sources.
Last updated . See our editorial standards, and how we check reviews, before you rely on a page. This website is run by a U.S. stocking partner, not by the manufacturer. We are paid when you buy through our order links.
Keep reading
More about Mighty K9
Guaranteed Analysis
The Guaranteed Analysis panel read line by line, with the calorie math and the details the bottle leaves out.
Read more
Ingredients
All three Mighty K9 ingredients in label order, with amounts, jobs and what dog research shows.
Read more
Testing & quality
What the GMP and Made in USA badges do and do not mean, and what a real lab certificate should show.
Read moreU.S. stocking partner for Mighty K9
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