CBD for Older Dogs: What Veterinarians Actually Say

If you have an older dog, someone has probably already suggested CBD to you. A neighbor, a groomer, maybe a display at the pet store. The pitch is everywhere: less stiffness, less anxiety, a happier senior dog.

Here is what that pitch usually leaves out. The research is early. The FDA has not approved a single CBD product for pets. And plenty of what is on the shelf does not contain what the label says.

None of that means CBD is worthless. It means the honest answer is more complicated than the marketing, and your dog deserves the honest answer.

Why so many dog owners are asking

Arthritis is one of the most common chronic conditions in older dogs. If your dog takes longer to get up, hesitates at the stairs, or has quietly given up on the couch, you have seen it.

The standard treatments (prescription anti-inflammatories, joint injections, weight management, physical therapy) work well for many dogs. But some dogs cannot tolerate the drugs, some owners worry about long term side effects, and some dogs still hurt despite treatment. That gap is where CBD marketing lives.

Add anxiety (thunderstorms, vet visits, being left alone) and it is easy to see why pet CBD became a big business aimed largely at people with aging dogs.

What the research actually shows, honestly graded

There is real science here, and some of it is encouraging. It is also small, early, and far from settled. Here is a fair grading.

Arthritis discomfort: promising, but based on small studies. The best known study came from Cornell’s College of Veterinary Medicine, led by Dr. Joseph Wakshlag and published in Frontiers in Veterinary Science in 2018. Dogs with osteoarthritis received either CBD oil (2 mg per kg, twice daily) or a placebo, each for four weeks. On owner questionnaires and veterinary exams, more than 80 percent of the dogs showed decreased pain and increased activity while on CBD. That is genuinely encouraging. It is also a study that only 16 dogs completed. Cornell’s own Riney Canine Health Center calls the results promising while noting more research is needed.

Seizures: encouraging early results. At Colorado State University, Dr. Stephanie McGrath ran a small clinical trial in dogs with epilepsy, published in the Journal of the American Veterinary Medical Association in 2019. Eighty nine percent of dogs receiving CBD alongside their regular seizure medication had fewer seizures. Again, the numbers were tiny (nine dogs on CBD, seven on placebo), and follow up dose finding work has continued with support from the AKC Canine Health Foundation. Encouraging is the right word. Proven is not.

Anxiety and stress: thinner than you would guess. This is the claim on half the packages, and it has the least support. A 2023 study from the Waltham Petcare Science Institute found that a single dose of CBD reduced some measures of stress in dogs during car travel and separation. That is one study, in specific situations, measuring stress markers rather than curing anxiety. For noise fears, the most common reason owners reach for CBD, the evidence is weaker still.

Everything else: unknown. Cognitive decline, cancer, general “wellness.” No solid evidence in dogs. Anyone claiming otherwise is selling something.

Two more things an honest article has to say. First, in the Cornell arthritis study, dogs on CBD showed elevated liver enzyme values on bloodwork. Researchers are still working out what that means, which is exactly why veterinary monitoring matters. Second, long term safety in dogs, over months and years, has simply not been established.

What the FDA and AVMA say

The FDA has not approved any CBD product for use in animals. Not for arthritis, not for anxiety, not for anything. In the agency’s words, it cannot ensure the safety or effectiveness of these products. The FDA has sent warning letters to pet CBD companies as recently as June 2025 for marketing unapproved products with medical claims.

There is movement. In January 2025, the FDA’s Center for Veterinary Medicine formally asked veterinarians and the public for information on cannabis derived products in animals, a step toward possible clearer rules. But as of this writing, nothing on the pet store shelf is FDA approved.

The American Veterinary Medical Association takes a similarly careful line. Its guidance for veterinarians notes that cannabinoids like CBD “appear to hold therapeutic promise” for pain and inflammation associated with osteoarthritis and for epilepsy, while stressing that valid research in animals is limited. Also worth knowing: in some states, veterinarians are legally restricted in what they can recommend or even discuss about cannabis products, which is why your vet may answer cautiously.

Questions to ask your veterinarian

This is the non negotiable step. Talk to your veterinarian before giving your dog any CBD product. Not after you have started. Before.

The biggest reason is drug interactions. CBD is processed by the same liver enzymes that metabolize many common medications. Cornell’s veterinary college warns that combining CBD with other drugs can change how those medications perform. If your dog takes anything for pain, seizures, heart disease, or anxiety, this is not a detail. It is the whole conversation.

Good questions to bring:

• Given my dog’s conditions and current medications, is CBD reasonable to try at all?
• Have we exhausted the treatments with stronger evidence first?
• If we try it, what dose, and how will we measure whether it is working?
• Should we run bloodwork before starting and recheck liver values later?
• What side effects should send me back to your office?

A vet who says “let’s try proven arthritis treatment first” is not being dismissive. That is the evidence based answer.

How to spot a quality product, if you and your vet decide to try it

If your veterinarian is on board, product quality becomes the next problem, and it is a real one. When Cornell researchers analyzed 29 pet CBD products, only about a third contained within 10 percent of the CBD amount on the label. Two contained no cannabinoids at all. Four had heavy metal contamination.

So the checklist matters:

• Demand a certificate of analysis (COA). This is a third party lab report showing actual CBD content plus testing for THC, pesticides, and heavy metals. Reputable companies post COAs for each batch. No COA, no purchase.
• Check the THC number. It should be at or below 0.3 percent. THC is toxic to dogs, and dogs are more sensitive to it than people are.
• Look for the NASC seal. The National Animal Supplement Council audits member companies for quality practices.
• Buy products made for animals. Human products can contain xylitol or other ingredients dangerous to dogs.
• Ignore medical claims on the label. Legitimate companies do not promise to treat arthritis or anxiety, because that would be an unapproved drug claim.
• Start low, go slow, and report back to your vet.

The bottom line

CBD for senior dogs sits in an uncomfortable middle: more promising than a fad, far less certain than the marketing. Small studies suggest it may help some dogs with arthritis discomfort, the FDA has approved nothing, and product quality is a coin flip without a COA. Your veterinarian, who knows your dog’s health history and medications, is the only good starting point.

Your dog gave you their best years. The least we can do is bring them honest information in return.

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Sources

• Cornell Riney Canine Health Center: CBD, what you need to know about its uses and efficacy
• Pharmacokinetics, Safety, and Clinical Efficacy of Cannabidiol Treatment in Osteoarthritic Dogs (Frontiers in Veterinary Science, 2018)
• Colorado State University: Results from CBD clinical trial on seizure frequency in dogs “encouraging”
• AKC Canine Health Foundation: Evidence for the Use of CBD to Treat Canine Idiopathic Epilepsy
• FDA: Regulation of Cannabis and Cannabis-Derived Products, Including Cannabidiol (CBD)
• AVMA: FDA issues warning letters to companies selling unapproved CBD products
• Covington: FDA’s CVM Seeks Information on Use of Cannabis-Derived Products in Veterinary Practice (January 2025)
• AVMA: Cannabis use and pets
• Waltham Petcare Science Institute: A single dose of cannabidiol positively influences measures of stress in dogs (Frontiers in Veterinary Science, 2023)