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Dog Supplement Labels Explained: How to Read a Guaranteed Analysis
A dog supplement label shows a guaranteed analysis, not a Supplement Facts box. It lists minimum protein and fat and maximum fiber and moisture, then any named extras. Ingredients run from heaviest to lightest, and calories appear per kg and per serving. An asterisk marks anything AAFCO does not count as an essential dog nutrient.
Written by the Mighty K9 editorial teamUpdated · 8 min read
The basics
Why do dog supplements have a guaranteed analysis?
Because in the U.S., pet supplements are regulated as animal food or animal drugs, not as dietary supplements. FDA decided in 1996 that the human supplement law (DSHEA) does not apply to animal products (FDA, Pet food regulation).
So instead of a Supplement Facts box, most dog supplements print a guaranteed analysis, the same panel you see on a bag of kibble. A product that claims to treat or prevent a disease counts as a drug under FDA rules. Many animal supplements are technically unapproved drugs that FDA chooses not to act against (AVMA, Pet supplements).
Our worked example is Mighty K9, the olive oil and ESS60 drops this site sells.
Worked example
What does each line of a dog supplement label mean?
Tap a number on the Mighty K9 panel to see what that line says and means.
- Brand name
MIGHTY K9, Canine Supplements: the brand wordmark. The label image names no manufacturer or facility.
- Label photo
A spaniel resting its chin on the panel. Artwork, not a promise of results.
- Serving size
Per 2 mL serving, 30 servings per container. One 60 mL bottle lasts 30 days at one serving a day.
- Protein, fat, fiber, moisture
Crude protein (min) 0%, crude fat (min) 100%, crude fiber (max) 0%, moisture (max) under 0.1%. In plain words: it is all oil.
- ESS60 amount
ESS60 1.6 mg per 2 mL serving. A full bottle holds 48 mg.
- The asterisk
Not recognized as an essential nutrient by the AAFCO Dog Food Nutrient Profiles. AAFCO rules require this note for any guaranteed substance outside its nutrient list.
- Calories
8,100 kcal ME per kg, or 16.2 kcal per 2 mL serving. That matches pure olive oil.
- Ingredients
Extra Virgin Olive Oil, ESS60 and Bacon Flavor, in order of weight. No amount is printed for the bacon flavor.
Guaranteed analysis
How do I read the guaranteed analysis numbers?
Read the "Min" and "Max" carefully. Protein and fat are minimums; fiber and moisture are maximums (AAFCO, Reading labels). The product must contain at least the minimum and no more than the maximum.
| Label line | Type | What it tells you |
|---|---|---|
| Crude Protein (Min) 0% | Minimum | No protein is promised |
| Crude Fat (Min) 100% | Minimum | The liquid is fat, meaning oil |
| Crude Fiber (Max) 0% | Maximum | No fiber |
| Moisture (Max) <0.1% | Maximum | Almost no water |
| ESS60* 1.6 mg | Named extra | The C60 amount per serving; asterisked |
"Crude" refers to the lab method, not ingredient quality.
Ingredient list
What does the order of ingredients on a label mean?
Ingredients are listed by weight, heaviest first, and usually without amounts (AAFCO, Reading labels). The first ingredient is the main one.
Mighty K9 lists "Extra Virgin Olive Oil, ESS60 and Bacon Flavor." Olive oil is nearly the whole 2 mL serving, about 1.8 g (USDA, Olive oil). ESS60 sits second at 1.6 mg, about 0.09% of the weight. The bacon flavor has no printed amount and no listed source.
Notice one more thing. The front panel says "Organic," but the ingredient line names no organic certifier. Treat words on the front as the brand's claim and the ingredient line as the label fact. See every line typed out on our Guaranteed Analysis page.
Calories
What does kcal ME/kg mean on a dog supplement?
It is the calorie count per kilogram of product, as fed. ME stands for metabolizable energy, the calories a dog can actually use after digestion. AAFCO rules call for calories on that basis (AAFCO, Model regulations), given in kcal per kg (AAFCO, Reading labels).
Per kilogram is hard to use at home, so good labels add a per-unit number. Mighty K9 prints both: 8,100 kcal ME/kg and 16.2 kcal ME per 2 mL serving. The per-serving figure matches pure olive oil (USDA, Olive oil).
Add it to your dog's treat budget. Extras should stay under 10% of daily calories (WSAVA, Treats). At 16.2 kcal, a serving is about 5% of a 10 lb dog's day.
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Order nowThe asterisk
What does the asterisk on a pet supplement label mean?
It means the ingredient is not an essential nutrient for dogs. AAFCO rules require that note for any guaranteed substance that is not in its dog nutrient profiles (AAFCO, Model regulations).
On Mighty K9, the asterisk sits next to ESS60: "Not recognized as an essential nutrient by the AAFCO Dog Food Nutrient Profiles." It is not a warning. It tells you dogs do not need the ingredient, and the label makes no nutrient claim for it.
Complete and balanced
Is a dog supplement complete and balanced?
Usually not. FDA explains that treats, snacks and supplements are generally not complete and balanced and are not meant to be a dog's only food (FDA, Complete and balanced). A "complete and balanced" statement belongs on a full diet.
Supplements also skip a step that drugs go through. FDA does not approve pet supplements before sale, and no agency checks their safety, quality or effect first (Tufts Petfoodology, Supplements). Our post on FDA rules for pet supplements covers the details.
Seals
What does the NASC seal on a dog supplement mean?
The National Animal Supplement Council (NASC) Quality Seal means the company passed an independent facility audit, keeps a quality manual, reports adverse events and follows label rules (NASC, Quality Seal). It shows good company processes. It does not prove a product works.
Mighty K9 does not show the NASC seal on its bottle or graphics. Its Good Manufacturing Practice badge names no certifier. See testing and quality for what each badge means.
Checklist
What should I look for on a dog supplement label?
| Check | Good sign | Red flag | Mighty K9 |
|---|---|---|---|
| Amounts | Each active listed in mg per serving | A "proprietary blend" with no amounts | ESS60 1.6 mg; flavor amount not listed |
| Calories | Per kg and per serving | No calorie statement | Both printed |
| Serving | Clear serving size, ideally by weight | No serving or "as needed" | 2 mL per serving; no weight bands printed |
| Claims | Structure words with evidence | Claims to cure or treat disease (FDA, Pet food regulation) | No disease claim on the label |
| Maker | Company name and address | No contact information | Manufacturer not printed |
| Quality seal | NASC seal or a named certifier | Badges that name no one | No NASC seal; GMP badge names no certifier |
| Lot and date | Lot number and best-by date | Neither printed | Not shown on the label images |
Big promises from tiny studies are another red flag. Health claims need competent and reliable evidence, generally randomized trials (FTC, Health claims). For Mighty K9's ESS60, that evidence is rodent-only; see the ESS60 page. Bring any label to your vet if you are unsure (Tufts Petfoodology, Sensible use).
FAQ
Dog supplement label FAQ
What is a guaranteed analysis on a dog supplement?
It is the nutrient panel required on pet foods and most pet supplements. It lists minimum crude protein and fat and maximum crude fiber and moisture, plus any other guaranteed ingredients. It replaces the Supplement Facts box you see on human supplements.
Why does my dog supplement not have Supplement Facts?
Because the U.S. dietary supplement law does not apply to animals. FDA regulates pet supplements as animal food or animal drugs, so they use a guaranteed analysis like pet food. A product that claims to treat disease is treated as a drug.
Are ingredients on pet labels listed by weight?
Yes. Ingredients are listed in order of weight, heaviest first, usually without amounts. On Mighty K9, extra virgin olive oil comes first and makes up nearly the whole serving, ESS60 is second at 1.6 mg, and bacon flavor is last.
What does kcal ME/kg mean on a pet label?
It means kilocalories of metabolizable energy per kilogram of product, as fed. Metabolizable energy is the share of calories a dog can use. Look for a per-serving figure too; Mighty K9 lists 16.2 kcal per 2 mL serving.
What does not recognized as an essential nutrient by AAFCO mean?
It means dogs do not need that ingredient in their diet, according to the AAFCO Dog Food Nutrient Profiles. AAFCO rules require the note for any guaranteed substance outside its list. It is not a safety warning, just a label rule.
Does Mighty K9 have the NASC seal?
No. The NASC Quality Seal does not appear on the Mighty K9 bottle or brand graphics. The NASC seal reflects audited company processes rather than proof a product works. Mighty K9's Good Manufacturing Practice badge does not name a certifier.
Is a dog supplement complete and balanced?
Almost never. FDA says treats and supplements are usually not complete and balanced and should not be a dog's only food. A supplement adds to a full diet. Count its calories as part of the 10% treat budget.
Who wrote this
Written and reviewed by
Plain-language pages built from the label, the sales page and linked veterinary and government sources.
Last updated . Our editorial standards and the way we check reviews are published. This website is run by Gomightyk9, an authorized Mighty K9 shop, not by the manufacturer. We earn money when you buy through our order links.
Keep reading
More about Mighty K9
Guaranteed Analysis
The label panel decoded line by line: fat, moisture, the ESS60 asterisk, calories and what is missing.
Read moreTesting & quality
Seven badges, no NASC seal and no public lab report: what Mighty K9's quality marks really tell you.
Read more
FDA rules for pet supplements
Who regulates dog supplements, what FDA does not check, and how to read any label or claim with clear eyes.
Read moreAuthorized U.S. shop for Mighty K9
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