How to Read a CBD Certificate of Analysis for Dogs
A CBD certificate of analysis (COA) is a laboratory report that lists what a specific batch of a product contained when it was tested. To read one, confirm that it matches your product and lot number, check which lab ran it, then review the THC result, the CBD amount and its units, and the contaminant tests. Finally, compare those numbers with the product label.
A COA is useful for understanding what is in a product. It does not show that a product is safe or effective for dogs, and CBD is not FDA-approved for animal use. Brands differ in how much testing information they share, and you can use the same checklist on any pet CBD product, including CannaChews CBD Soft Chews for Dogs.
What Is a Certificate of Analysis for CBD?
A certificate of analysis is a report, usually from a third-party laboratory, that documents test results for a particular sample. For CBD products, it typically covers cannabinoid content and may also cover contaminants. The results apply to the batch that was tested, so a report for one lot does not automatically describe another.
What Should a COA for a Dog CBD Product Include?
Report layouts vary, but most include the sections below.
| Section | What it shows | What to look for |
|---|---|---|
| Header | Lab name, report date, product name, batch or lot number, sample type | A lot number that matches your package and a recent date |
| Cannabinoid profile | CBD, THC, and other cannabinoids | Clear units and numbers that match the label |
| Total THC | Calculated THC including its acid form | A reported value or "not detected" |
| Pesticides | Residues of agricultural chemicals | Results listed by compound, not only "pass" |
| Heavy metals | Metals such as lead, arsenic, cadmium, and mercury | Numeric results or "ND" for each metal |
| Residual solvents | Leftover solvents from extraction | Results for extracts, where applicable |
| Microbials and mycotoxins | Mold, yeast, bacteria, and mold-produced toxins | Results for the finished product, where tested |
How to Read a CBD COA Step by Step
1. Match the report to your product and lot
Find the batch or lot number on your package and on the COA. If they do not match, the report may describe a different batch. If your package has no lot number, ask the brand how to find the right report.
2. Check the lab and its accreditation
Look for the laboratory's name and whether it states accreditation to ISO/IEC 17025, an international standard for testing labs. Accreditation applies to specific tests, so ideally the lab's scope covers the analyses on your report. A COA from the manufacturer's own lab is less independent than one from a third party.
3. Confirm what was tested
Some COAs describe the raw extract or isolate, while others describe the finished product, such as a chew or an oil. Both can be useful, but only a finished-product report tells you what is in the product your dog would actually eat.
4. Read the CBD results and the units
Potency may be shown as a percentage, as milligrams per gram (mg/g), or as milligrams per unit. These are not interchangeable. For example, if a COA reports 2 mg/g of CBD and each chew weighs 4 grams, that works out to 8 mg per chew. This is illustrative arithmetic only, not a product or a recommended amount. Compare your result with the CBD amount printed on the label.
5. Find the THC and total THC results
Raw hemp contains THCA, a non-intoxicating acid form that converts to THC with heat. For that reason, labs often report "total THC," commonly calculated as delta-9 THC plus 0.877 times THCA. Look for this number, or for "ND" (not detected). Dogs can be much more sensitive to THC than people, so this section deserves attention. The comparison in our guide to broad-spectrum vs. full-spectrum CBD for dogs explains why a label alone cannot tell you the THC content.
Federal hemp rules are also changing. As of October 2026, the federal definition is moving to a total-THC standard, with a 0.4 milligram per container cap for finished hemp-derived cannabinoid products, scheduled to take effect December 11, 2026, according to the Congressional Research Service. How these rules apply to pet products can depend on federal and state law.
6. Review the contaminant panels
Look for pesticide, heavy metal, and, for extracts, residual solvent results. Microbial and mycotoxin results are also common. The most informative reports list individual results rather than a single "pass." A result of "ND" means the substance was not detected at the lab's reporting threshold.
7. Compare the COA with the label
The CBD amount, the product name, and any broad-spectrum, full-spectrum, or isolate description should be consistent with the report. If they are not, ask the brand to explain. Our guide to CBD chews vs. CBD oil for dogs explains how amounts are stated for different formats.
Common COA Terms Explained
- ND (not detected): the substance was not found above the lab's detection limit. It does not prove the substance is absent.
- LOD (limit of detection): the lowest amount the lab can reliably detect.
- LOQ (limit of quantitation): the lowest amount the lab can measure with confidence. A result marked below the LOQ was seen but not precisely measured.
- mg/g: milligrams of a compound per gram of product.
- ppm and ppb: parts per million and parts per billion, commonly used for metals and pesticides.
- THCA and CBDA: acid forms of THC and CBD that are present in raw hemp.
What a COA Cannot Tell You
A COA describes composition, not outcomes. It does not establish that a product is safe for your dog, that it is effective, or that it will not interact with a medication. Results also apply only to the tested batch and the tests that were run. For these reasons, a COA works best as one piece of information that you share with your veterinarian. For more on safety questions, see are CBD chews safe for dogs.
COA Red Flags
- No batch or lot number, or a number that does not match your package
- No lab name, or no way to contact the lab
- A report that is old or unrelated to the current formulation
- A COA for the raw ingredient only, when you are buying a finished product
- Potency results with no contaminant testing
- "Pass" labels with no underlying numbers
- No THC result, or numbers that do not match the label
- Claims on the label or website that the COA cannot support
Using a Product Page as a Starting Checklist
When you review any pet CBD product, check the ingredient list, the labeled CBD amount, and whether a batch-specific COA is available. For CannaChews, you can review the CannaChews ingredients and formulation on the product page, which describes the chews as made with broad-spectrum CBD. If a COA is not posted alongside a product, it is reasonable to ask the brand for the report that matches your lot.
This article is general education. It does not state that CannaChews treats, prevents, or relieves any condition, and it does not recommend CBD for any specific dog.
Frequently Asked Questions
What is a COA for CBD dog products?
It is a laboratory report that lists the test results for a specific batch, usually including cannabinoid content and sometimes contaminants.
Where can I find a COA?
Brands may post COAs on product pages, link them through a QR code on the package, or provide them on request. Make sure the lot number matches your product.
Does a COA mean a CBD product is safe for my dog?
No. A COA shows what was found in a tested batch. It does not establish safety, effectiveness, or the absence of medication interactions.
What does ND mean on a COA?
ND means "not detected," which indicates the lab did not find the substance above its detection limit.
Should a COA list THC?
Yes. A useful COA reports THC or total THC, or states that it was not detected, because THC content differs between products and dogs can be sensitive to it.
Should I talk to my veterinarian about a COA?
Yes. A veterinarian can help you interpret the information alongside your dog's health history and any medications.
Final Thoughts
Reading a COA comes down to a few checks: matching the lot number, confirming the lab, reading the THC and CBD results with their units, reviewing the contaminant panels, and comparing everything with the label. A report cannot prove safety or effectiveness, but it can help you ask better questions of a brand and of your veterinarian. To review one example of a chew product page, see the CannaChews product information.
Sources and Further Reading
- Missouri Department of Agriculture: Certificate of Analysis Guide (Industrial Hemp Program)
- Congressional Research Service: Changes to the Statutory Definition of Hemp
- Cornell University Riney Canine Health Center: Cannabis (THC) intoxication in dogs
- FDA: Regulation of Cannabis and Cannabis-Derived Products, Including CBD
This article is for general educational purposes and is not veterinary medical advice. It does not recommend CBD for the prevention, diagnosis, treatment, or cure of any condition. Consult a licensed veterinarian about your dog's individual needs.
