Does your dog wake you up at 3 a.m. scratching? Does it also lick its paws raw or break out in hot spots? If you answered yes, it likely has an allergy.

Studies suggest canine atopic dermatitis (CAD), a widespread allergy, affects roughly 10-15% of dogs. Other sources note a range of 3-15%.

Allergy treatments for dogs can quickly become expensive, so owners intrigued by marketing claims, anecdotal testimonials, and the promise of an affordable solution are turning to natural remedies, such as CBD, for their furry friend.

We wish we could say CBD is a magical cure for your pet's allergies, but unfortunately that's not the case. However, promising evidence suggests it can help alleviate the most annoying symptom dogs experience during an allergic reaction: itching.

In this article, we will give an honest review of CBD for dog allergies and itchy skin, while noting the gap between published scientific evidence and enthusiastic marketing. We will also explain how CBD compares to established treatments and note current quality and efficacy concerns.

Why Dogs Itch: Allergies 101 (and Why the Vet Comes First)

Fleas, food, and the environment are the top three causes of allergies in dogs. Identifying the culprit is the most crucial first step to providing suitable itch relief and overall allergy management.

Fleas can cause an allergy known as flea allergy dermatitis, or FAD. Some dogs are sensitive (allergic) to flea saliva and develop allergic reactions when fleas inject saliva into their bodies while sucking blood.

Dogs can also be allergic to proteins found in certain foods. Studies report beef, dairy, chicken, wheat, and lamb as the most common food allergens in dogs.

Environmental allergies, or canine atopic dermatitis (CAD), are a chronic skin disease in which the dog's immune system overreacts to allergens found in the environment, such as pollen, molds, and dust mites.

As you can see, allergies in dogs are an umbrella term that includes several forms and a variety of allergens. That is why, before proceeding with any supplement or treatment, your dog needs a full vet workup.

To make things more complex, different allergies can co-exist in the same dog. For example, a dog allergic to pollen can also be sensitive to beef. Or, a dog with airborne atopic dermatitis can react badly to flea saliva.

First, the vet will confirm that your dog does have an allergy, then identify the underlying culprit. Paw licking and chewing are red flags that can signal allergies.

These symptoms aren't exclusive to allergies and can develop from other skin conditions. So your vet must diagnose the allergy before you start supplementing with CBD.

Using CBD for other skin conditions or when unnecessary not only delays proper treatment, but also allows the disease to progress and worsen.

Does CBD Help Dogs With Allergies and Itching?

A prospective, randomized, double-blind, placebo-controlled 2022 study found that CBD can help reduce itchiness in dogs with atopic dermatitis.

The study included 32 client-owned dogs divided into two groups. The first group (17 dogs) received CBD/CBDA oil (2 mg/kg every 12 hours for four weeks), and the other group received a placebo.

The two groups were evaluated for two criteria - itchiness and skin lesions - once on day 14 and then again on day 28 of the trial.

By day 14, owners of dogs in the CBD/CBDA-supplemented group noticed reduced itchiness. However, the itch relief was not associated with improvement in skin sore lesions at day 14 or day 28.

Namely, the study concluded that "CBD/CBDA as an adjunct therapy decreased pruritus, and not skin lesions associated with cAD in dogs."

Four of the 17 dogs treated with CBD/CBDA oil had elevated levels of alkaline phosphatase, accenting the need for liver monitoring during long-term CBD use.

That same year, another study reached similar conclusions about CBD's effect on itch relief. The study included a retrospective series of eight dogs with atopic dermatitis. They were given THC-free CBD (at doses of 0.14 to 1.43 mg/kg/day, for over 8 weeks), alongside existing meds (such as Apoquel and prednisolone).

The itching scores decreased in 7 of the 8 dogs. However, there was no control group, and the authors acknowledge that the improvements can't be attributed to CBD alone, as it was used as an add-on, rather than a sole treatment.

Earlier, in 2012, a study examining the expression of cannabinoid receptors (CB1 and CB2) in the skin of healthy dogs and dogs with CAD found stronger immunoreactivity in the skin of dogs with atopic dermatitis.

Given the immune-mediated basis of allergies in dogs, the stronger reactivity suggests biological plausibility for CBD in allergy management; however, it is not definitive proof of efficacy.

A recent Veterinary Sciences study published in 2025 notes that most studies on the effect of CBD oil on AD are limited because they are observational and not placebo-controlled, include small sample sizes, and use CBD at inconsistent doses.

Based on current research, it is safe to assume that CBD for dogs with allergies and itchy skin is promising for comfort, but unproven as a standard therapeutic tool. Basically, CBD can help take the edge off the itch, but it does not treat the allergy.

Can CBD Replace Apoquel or Cytopoint?

Apoquel and Cytopoint are prescription medications, formulated to stop itching by targeting itch signals. They are evaluated in randomized, controlled clinical trials involving thousands of dogs, and we know a lot about their efficacy, mechanisms of action, onset time, dosing, and safety profiles. Both Apoquel and Cytopoint are FDA-approved, so their manufacturing and labeling accuracy are closely monitored.

CBD, on the other hand, is a naturally occurring compound found in the hemp plant. It works through the ECS (endocannabinoid system) and is generally well tolerated. But it is not FDA-approved for dogs and lacks large-scale studies supporting its use for itch relief. Its manufacturing and labeling are underregulated.

During studies, CBD is used alongside standard treatments, as an add-on rather than a standalone cure. For example, in a 2022 study, seven of the eight dogs with CAD supplemented with CBD showed reduced itchiness, but they were also on oclacitinib (Apoquel) and prednisolone.

Science-backed allergy treatments with evidence-supported efficacy must not be replaced with CBD products, according to current data.

Also, always get your vet's approval before giving your dog CBD oil for allergies and itchy skin.

Prescription medications for allergies in dogs are expensive, but replacing them with CBD to lessen the financial burden is neither responsible nor scientifically supported.

Can Dogs Be Allergic to CBD or Hemp?

Yes, dogs can be allergic to CBD or hemp, but it's very rare. In general, dogs tolerate CBD and hemp well; however, individual sensitivities are possible.

Dogs can be sensitive to compounds found in the hemp plant itself or ingredients added to the final CBD product, such as carrier oils (like olive or coconut oil) and artificial flavors (chicken or beef).

There is no prevalence data for CBD/hemp allergies in dogs. The potential benefits of CBD for dogs outweigh the risk of allergic reactions.

To be on the safe side, always start your dog on CBD gradually - use a smaller dose and watch for allergy signs, like increased itching, hives, or swelling. Call the vet immediately if such signs occur.

Before seeking veterinary attention, make sure you're not confusing allergic reactions with normal CBD side effects, such as dry mouth, stomach upset, or lethargy.

A true allergic reaction involves the dog's immune system and can cause the symptoms above, even at small doses.

CBD Dosage for Dogs With Allergies

According to studies, you can give your dog 2 mg/kg of CBD twice daily. However, the dosing range can differ depending on the specific needs.

A 2021 randomized, placebo-controlled safety trial found that daily oral CBD at 1, 2, 4, or 12 mg/kg for 28 days was well tolerated by healthy dogs. The study reports "no clinically important changes in measured safety outcomes."

The trial saw an itch reduction by day 14. This is because CBD needs time to accumulate in the dog's system and reach stable bloodstream concentrations.

When introducing CBD to your dog's allergy management strategy, use the "start-low, go-slow" approach. Start with a smaller CBD dose and gradually increase the amount. This approach reduces the risk of side effects by giving your dog time to adjust to the supplement.

Before starting your dog on CBD products, talk to a veterinarian. Consulting a vet is critical, especially if the dog is taking other medications. CBD can increase certain liver enzymes (alkaline phosphatase, or ALP). If taken concurrently with meds metabolized in the liver, it can result in hepatotoxicity or alter their efficacy.

If you suspect your dog has an allergy, see a veterinarian and get a diagnosis. Talk to your vet, create a treatment plan, and follow their instructions. Ask your vet about adding CBD (not replacing your current treatment with it).

If the vet approves CBD use and you decide to proceed, consider quality standards and choose the right CBD. Finally, with your vet, monitor your dog's response (practice periodic checkups of its liver values) and assess allergy symptoms two to four weeks after introducing CBD.

Safety & Side Effects

CBD for dogs is "generally safe and well tolerated," according to studies. However, side effects can occur in some dogs, though they are rare.

Drowsiness and gastrointestinal upset (manifesting with diarrhea) are the most common CBD side effects. Another possible adverse event is increased liver enzymes.

In a 2022 trial, 4 of the 17 CBD/CBDA-treated dogs had elevated levels of the liver enzyme ALP (alkaline phosphatase). The finding correlates with previous reports. A 2018 CBD study on dogs with arthritis found elevated ALP levels in 9 of the 22 dogs involved.

These results accent the importance of periodic liver value checks, especially if the CBD is used for a prolonged period. Liver monitoring is also critical if the dog is taking other medications that are metabolized by the liver.

Keep in mind that the "FDA has not approved cannabis for any use in animals, and the agency cannot ensure the safety or effectiveness of these products."

Without FDA approval and oversight, there are no guarantees about CBD quality, safety, or label claims. Therefore, use only third-party tested CBDs with available Certificates of Analysis (COAs).

Last but not least, never give your dog CBD made for humans. Human CBDs are sourced from marijuana and contain THC (tetrahydrocannabinol), which is toxic to pets. Plus, some human CBDs can have xylitol - a sweetener that is also toxic to dogs.

Hot Spots, Paw Chewing & Topical Care

Hot spots and paw chewing are telltale signs of allergies in dogs. Hot spots are wet, red, and painful skin sores. They develop quickly when a dog licks, chews, or scratches an itchy part of its body because of allergies.

Paw chewing is self-explanatory. Allergies cause intense skin inflammation, and the dog chews (licks or scratches) to find relief. The friction and moisture associated with these activities break the skin barrier, allowing yeast and bacteria to grow and cause secondary infections.

Both hot spots and secondary skin infections require veterinary attention. Hot spots can become raw and oozing, while secondary infections are painful and add to the itchiness.

You can keep itchy areas clean and free from allergens with regular baths using a gentle shampoo formulated for dogs.

Topical CBD care is not well researched. CBD has been studied for itch control, but the evidence for CBD topicals in dogs is scant.

How to Choose a CBD Oil for an Itchy Dog

The pet CBD market lacks regulations, resulting in significant discrepancies between actual and labeled cannabinoid content, purity, and safety.

Finding the right CBD product in such a marketplace can be overwhelming. To make the choice easier, focus on the following criteria.

	Certificate of Analysis From independent, ISO-certified laboratories as a minimum standard for safety and quality assurance.
	USDA Organic Ingredients Made from organic, US-grown hemp with high-quality soil and farming practices.
	Full-Spectrum Extract More potent than broad-spectrum or isolate formulas.
	THC-Free Formulation Extracted from hemp, containing no more than 0.3% THC.
	Clear mg Labeling Label and COA show exactly how much CBD per mL, for correct dosing.
	Dog-Specific Production Made exclusively for dogs, never repurposed from human CBD products.

Honest Paws Well CBD Oil

A general-purpose, full-spectrum CBD oil that meets each criterion above — COA-verified, USDA organic hemp, THC-free.

Shop Well CBD Oil

Beyond CBD: The Complete Itch-Relief Plan

Itch control is a multimodal mission, rather than a universal go-to solution. CBD for dogs is just one comfort layer in a stack of allergy-management strategies. Here is a closer look at a complete itch-relief plan.

For the omega-3 recommendation above, see Honest Paws Omega-3 Fish Oil.

Conclusion — Comfort While You Fix the Cause

Dog allergies are chronic, immune-mediated conditions that require lifelong, multimodal management. No single product, mainstream or alternative, can cure allergies.

The desire for natural and affordable treatment options is understandable. At the same time, your itchy dog deserves an effective management plan.

Therefore, CBD for dog allergies and itchy skin is a promising but unproven supplement that can be an add-on, not a replacement for treatment.

Think of CBD as a temporary tool you can use to soothe your dog's allergy symptoms, while the vet identifies the allergy type and crafts a personalized management strategy.

Remember, CBD products do not meet the same quality standards as mainstream treatments. It is your responsibility to find a safe and high-quality CBD product for your dog's allergy.