CBD Calming Chews for Dogs vs Oil: How the Formats Differ

This page includes an affiliate product link in the sidebar. If you purchase through that link, PetCalmZone may earn a commission at no extra cost to you. The article itself contains editorial links to research sources and related guides. PetCalmZone is not a veterinary practice, and this guide does not replace advice from your veterinarian.

CBD calming chews for dogs and CBD oil may contain the same main cannabinoid, but the format can affect convenience, ingredients, labeling and how cannabidiol is absorbed.

That does not mean one format has been proven better for dog anxiety.

Research on CBD and canine stress remains limited. Studies have tested particular formulations, specific groups of dogs and specific stressors, so their findings should not automatically be extended to other products or to dogs with a diagnosed anxiety disorder.

The FDA states that cannabis has not been approved for any use in animals and that it cannot ensure the safety or effectiveness of cannabis products marketed for pets. It recommends discussing appropriate treatment options with a veterinarian. U.S. Food and Drug Administration

This comparison focuses specifically on CBD-containing chews versus CBD-containing oil. For the broader context of supplements, herbs and other approaches, see our natural remedies for dog anxiety guide.

Table of Contents

CBD Chews, CBD Oil and Regular Calming Chews Are Different Products

Pet-product labels can make these categories look more similar than they really are.

CBD oil is a liquid preparation containing cannabidiol in a carrier oil. A useful label identifies the CBD content clearly and allows the product to be matched with its laboratory documentation.

CBD chews or treats contain cannabidiol in a solid or semi-solid product. They can also contain flavorings, fats, herbs, amino acids or other ingredients.

Non-CBD calming chews are a different category. They may contain ingredients such as L-theanine, alpha-casozepine, probiotics, tryptophan, melatonin or botanical ingredients.

Hemp seed oil or a product simply labeled “hemp” should not automatically be treated as a CBD product. The ingredient panel and cannabinoid information matter more than the front-label wording.

If you want to compare non-CBD supplement options instead, see our calming supplements for dogs guide.

Quick Comparison: CBD Chews vs CBD Oil

The most defensible difference today is therefore practical and pharmacokinetic, not a proven difference in anxiety treatment.

Does Research Show That CBD Oil Works Better Than CBD Chews?

Not for anxiety.

Research does show that formulation can affect how cannabidiol is absorbed.

A 2024 pharmacokinetic study compared four oral CBD preparations in healthy dogs: oil-based, nanoemulsion, water-soluble and semi-solid CBD mixed into a treat. Plasma profiles differed between formulations, demonstrating that formulation matters for CBD exposure. The study did not test whether one preparation treated anxiety better. DOI: 10.3389/fvets.2024.1389810. PubMed

A 2025 study directly compared CBD in rice-bran oil with CBD treats in healthy dogs. After normalizing for the amount administered, the oil formulation produced higher maximum plasma concentrations and greater overall exposure than the treat formulation used in that experiment. Again, this was a pharmacokinetic result, not evidence that the oil was more effective for anxiety. DOI: 10.3390/ani15101470. PubMed

Practical takeaway: higher or faster blood exposure is not the same thing as better clinical control of anxiety.

What Have Studies Found About CBD and Stress in Dogs?

The evidence is mixed, and the studies answer somewhat different questions.

Morris et al. 2020

Sixteen healthy dogs received CBD-containing treats before a fireworks-sound fear test. Under the conditions studied, the results did not provide strong support for an anxiety-reducing effect of CBD.

The study involved one preparation, one experimental stressor and a small group of healthy dogs. DOI: 10.3389/fvets.2020.569565. Frontiers

Hunt et al. 2023

Forty dogs were assigned to either a brief separation test or a car-journey test. A single administration of a THC-free CBD distillate affected some stress-related measures compared with placebo, but the effects varied by measure and by test. The authors explicitly called for further research.

The study was funded by Mars Petcare, and all four authors were employees of Mars Petcare UK. DOI: 10.3389/fvets.2023.1112604. Frontiers

Flint et al. 2024

This study followed 19 dogs exposed repeatedly to short car journeys over six months. Some stress-related measures differed between the CBD and placebo groups at certain time points, while other measures did not.

The study addressed repeated car-travel stress in a research population. It did not establish efficacy for canine separation anxiety in general. All authors were employees of Mars Petcare. DOI: 10.1093/jas/skad414. PubMed

Flint et al. 2025

This study is particularly important to describe accurately.

Fifty-four dogs received one of several treatments before a short car journey: CBD alone at different studied amounts, a formulation containing CBD + L-tryptophan + α-casozepine, or placebo.

The statistically significant finding versus placebo was a smaller increase in cortisol with the combination containing CBD + L-tryptophan + α-casozepine.

The researchers reported no other significant treatment effects. Therefore, this study should not be described as demonstrating that CBD alone reduced stress.

CBD blood concentrations also varied substantially between individual dogs.

The research was fully funded by Mars Petcare, and all four authors (Flint, Weller, Hunt and King) were employees of Mars Petcare, which manufactures pet food and provides veterinary services. DOI: 10.3389/fvets.2025.1632868. Frontiers

What These Studies Do Not Establish

Collectively, these studies do not establish that:

• CBD chews treat separation anxiety
• CBD oil treats separation anxiety
• oil is clinically superior to chews
• one retail CBD brand works better than another
• a result from one CBD formulation applies to every CBD product.

Most of this research also involves healthy research dogs exposed to controlled stressors rather than privately owned dogs receiving treatment for a diagnosed anxiety disorder.

What to Check on a CBD Product Label

Confirm That the Product Actually Contains CBD

Do not assume that words such as “hemp,” “hemp extract” or “hemp oil” mean that a product contains a stated amount of cannabidiol.

Look for CBD or cannabidiol clearly identified on the label.

Look for a Batch-Specific Certificate of Analysis

A Certificate of Analysis, or COA, can help you check whether a laboratory detected the cannabinoids and contaminants reported for a particular batch.

Depending on the report, useful information can include:

• CBD content
• THC results
• heavy metals
• pesticides
• residual solvents
• microbiological testing.

A COA provides composition information. It is not proof that a product treats anxiety.

The FDA has raised concerns about CBD products with inaccurate cannabinoid labeling and about potential contaminants. U.S. Food and Drug Administration

Read the Entire Ingredient List

This is particularly important with chews.

If a CBD chew also contains amino acids, herbs or other active ingredients, the effects of the finished product cannot automatically be attributed to CBD.

Likewise, research performed on CBD alone does not validate a multi-ingredient chew.

Do Not Treat the Legal Hemp Threshold as a Veterinary Safety Limit

Federal law uses a delta-9 THC threshold in its definition of hemp. That legal distinction is not the same thing as a veterinary determination that a particular amount of THC is safe for a particular dog.

Product THC information should therefore be discussed in context with a veterinarian.

CBD Chews: Practical Advantages and Limitations

For dogs that readily accept treats, CBD chews can be convenient.

Possible practical advantages include:

• familiar treat-like format
• no liquid measuring at each administration
• fixed CBD content per chew when clearly labeled
• easy storage and transport.

Possible limitations include:

• fixed serving units
• more ingredients in many formulas
• formulation differences between brands
• difficulty knowing which ingredient caused a reaction in a multi-ingredient chew.

The amount contained in a chew should not be treated as a universal dosing recommendation.

CBD Oil: Practical Advantages and Limitations

CBD oils may have simpler formulations than multi-ingredient chews, although this depends on the product.

Possible advantages include:

• CBD concentration can be clearly stated
• some formulas have relatively short ingredient lists
• the liquid format provides flexibility when a veterinarian recommends an individualized plan.

Possible limitations include:

• some dogs resist liquid administration
• measuring errors are possible
• concentrations differ widely between products
• carrier oils and other ingredients still require review.

The ability to measure a liquid more precisely does not mean owners should develop their own dosing protocol.

For a separate comparison of CBD products themselves, see our CBD products for dogs with anxiety guide.

Is One Format Safer?

There is not enough evidence to declare either CBD oil or CBD chews universally safer.

Safety depends on factors such as:

• the particular formulation
• cannabinoid content
• contaminants
• other ingredients
• the dog’s health
• other medications or supplements.

A randomized, placebo-controlled 28-day study examined repeated oral CBD administration in 20 healthy adult Beagles. Under the study conditions, measured adverse events were generally mild, but the highest studied amount was associated with more gastrointestinal adverse events and significantly higher serum alkaline phosphatase activity than placebo.

This study supports safety information about the conditions tested. It does not demonstrate that every retail CBD product is safe for every dog. DOI: 10.2460/ajvr.82.5.405. PubMed

The FDA has not approved CBD for use in animals and says that concerns about unproven claims, product quality and safety also apply to products marketed for pets. U.S. Food and Drug Administration

What About Medication Interactions?

CBD can affect biological pathways involved in drug metabolism, but an online comparison cannot determine whether a specific CBD product is appropriate alongside a particular medication.

If your dog takes medication, give your veterinarian:

• the complete medication list
• every supplement your dog receives
• the CBD product label
• the ingredient panel
• the batch COA if available.

Do not stop, replace or combine prescription medication with CBD based on a general product guide.

Can CBD Oil and CBD Chews Be Used Together?

Using two CBD-containing products changes the total exposure and may introduce additional ingredients.

Whether switching formats or using more than one CBD product is appropriate depends on the individual dog and should be discussed with a veterinarian.

Different formats do not make two products independent of one another: both can contribute cannabidiol to the total exposure.

CBD Products Do Not Replace Veterinary or Behavioral Care

Anxiety-like behavior can sometimes be associated with pain, illness or another medical issue, and severe separation-related distress can involve panic, self-injury or destructive escape behavior.

CBD products should therefore not be used as a substitute for veterinary evaluation.

When separation anxiety is part of the concern, management may also require an individualized behavior plan rather than a supplement alone.

For a broader explanation of separation-related behavior and treatment approaches, see our dog separation anxiety guide.

What About Non-CBD Calming Chews?

Non-CBD calming chews are a different category.

They may contain ingredients such as:

• L-theanine
• alpha-casozepine
• tryptophan
• probiotics
• melatonin
• botanical ingredients.

Evidence differs considerably between ingredients and products.

Research on CBD cannot validate these products, and research on those ingredients cannot be used as evidence that CBD works.

Keeping those categories separate also helps prevent misleading product comparisons.

Questions to Ask Your Veterinarian

Instead of asking only “chews or oil?”, useful questions include:

• Does this product clearly identify its CBD content?
• Is a current batch-specific COA available?
• What other ingredients does it contain?
• What does the laboratory report show about THC?
• Has this exact formulation been studied?
• Could any of my dog’s medications affect the decision?
• Does my dog have a health condition that changes the risk?
• Which format would be practical if you consider CBD appropriate?
• What changes or adverse signs should I monitor?
• What should prompt me to stop the product and contact you?

Common Mistakes When Comparing CBD Chews and Oil

Assuming More Absorption Means Better Anxiety Control

A formulation that produces higher CBD concentrations in blood has not automatically been shown to improve anxiety more effectively.

Pharmacokinetic superiority is not clinical superiority.

Comparing CBD Chews With Non-CBD Calming Chews

These are different categories.

Check whether cannabidiol is actually listed and quantified.

Treating “Vet Formulated” as Clinical Evidence

Marketing language is not equivalent to an independent clinical trial, veterinary approval or FDA approval.

Treating a COA as Proof That a Product Works

A COA helps evaluate product composition.

It does not demonstrate anxiety treatment efficacy.

Increasing or Combining Products Without Veterinary Guidance

Changing the amount used or combining products can alter total CBD exposure and introduce other ingredients.

Those decisions should be individualized with veterinary guidance.

Frequently Asked Questions

Are CBD calming chews the same as ordinary calming chews?

No. A CBD chew should identify cannabidiol as an ingredient. Many ordinary calming chews contain completely different ingredients and may contain no CBD.

Are CBD chews better than CBD oil for dog anxiety?

There is not enough clinical evidence to show that one format is generally better for canine anxiety.

Studies demonstrate differences in CBD pharmacokinetics between formulations, but that is not the same as proving superior anxiety outcomes. PubMed

Does CBD oil absorb differently from CBD treats?

It can.

In the 2025 oil-versus-treat study, the particular oil formulation produced greater dose-normalized systemic CBD exposure than the treat formulation tested. The result should not be generalized to every commercial oil or chew. PubMed

Has the FDA approved CBD for dogs?

No.

The FDA states that cannabis has not been approved for any use in animals and that it cannot ensure the safety or effectiveness of cannabis products marketed for pets. U.S. Food and Drug Administration

Can CBD chews and CBD oil be used together?

Do not assume that different formats can automatically be combined.

Both contribute CBD exposure, and a chew may contain additional ingredients. Discuss combination or switching decisions with your veterinarian.

Is a hemp chew automatically a CBD chew?

No.

“Hemp” can describe products that do not provide the clearly stated cannabidiol content expected from a CBD product. Check the full ingredient and cannabinoid information.

Key Takeaways

CBD chews and CBD oil are two delivery formats, not two established anxiety treatments with a proven winner.

Research shows that formulation can alter CBD absorption in dogs. It does not establish that CBD oil or CBD chews are generally superior for treating canine anxiety. PubMed

Studies of CBD and stress in dogs have produced mixed or measure-specific findings. Importantly, the 2025 CBD/L-tryptophan/α-casozepine study found a statistically significant cortisol result for the combined formulation, not for CBD alone, and no other treatment effects reached significance. Frontiers

Before choosing a product, focus on what it actually contains, whether a current batch-specific COA is available, what the evidence does and does not establish, and whether your veterinarian considers CBD appropriate for your dog.

Sources

1. U.S. Food and Drug Administration. FDA Regulation of Cannabis and Cannabis-Derived Products, Including Cannabidiol (CBD).
   Section: Pets and Other Animals.
   Main regulatory source. U.S. Food and Drug Administration
2. U.S. Food and Drug Administration. What You Need to Know (And What We’re Working to Find Out) About Products Containing Cannabis or Cannabis-derived Compounds, Including CBD.
   Supplementary source on safety, quality, contamination and products intended for animals. U.S. Food and Drug Administration
3. Morris EM et al. 2020. The Impact of Feeding Cannabidiol (CBD) Containing Treats on Canine Response to a Noise-Induced Fear Response Test. Frontiers in Veterinary Science 7:569565.
   DOI: 10.3389/fvets.2020.569565. Frontiers
4. Hunt ABG, Flint HE, Logan DW, King T. 2023. A single dose of cannabidiol (CBD) positively influences measures of stress in dogs during separation and car travel. Frontiers in Veterinary Science 10:1112604.
   DOI: 10.3389/fvets.2023.1112604.
   Funding: Mars Petcare. Authors employed by Mars Petcare UK. Frontiers
5. Flint HE, Hunt ABG, Logan DW, King T. 2024. Daily dosing of cannabidiol (CBD) demonstrates a positive effect on measures of stress in dogs during repeated exposure to car travel. Journal of Animal Science 102:skad414.
   DOI: 10.1093/jas/skad414.
   Authors affiliated with Waltham Petcare Science Institute / Mars Petcare. PubMed
6. Flint HE, Weller JE, Hunt ABG, King T. 2025. Treats containing cannabidiol, L-tryptophan and α-casozepine have a mild stress-reducing effect in dogs. Frontiers in Veterinary Science 12:1632868.
   DOI: 10.3389/fvets.2025.1632868.
   Funding: Mars Petcare. All authors employed by Mars Petcare. Frontiers
7. Limsuwan S et al. 2024. Pharmacokinetics behavior of four cannabidiol preparations following single oral administration in dogs. Frontiers in Veterinary Science 11:1389810.
   DOI: 10.3389/fvets.2024.1389810. PubMed
8. Kamutchat P et al. 2025. Pharmacokinetic Characteristics of a Single Cannabidiol Dose in Oil and Treat Forms and Health Impacts After 30 Days of Administration in Dogs. Animals 15(10):1470.
   DOI: 10.3390/ani15101470. PubMed
9. Vaughn DM, Paulionis LJ, Kulpa JE. 2021. Randomized, placebo-controlled, 28-day safety and pharmacokinetics evaluation of repeated oral cannabidiol administration in healthy dogs. American Journal of Veterinary Research 82(5):405–416.
   DOI: 10.2460/ajvr.82.5.405. PubMed