9 Best Allergy Supplements for Dogs in 2026

iHeartDogs is reader-supported. When you buy via links on our site, we may earn an affiliate commission at no extra cost to you.

Watching your dog scratch, chew, and rub their face raw is one of the most frustrating parts of pet ownership. Allergies in dogs are incredibly common, and they show up in ways that go beyond sneezing: red, irritated skin, chronic ear infections, obsessive paw licking, and hot spots that won’t heal. The right supplement can reduce these symptoms by supporting the immune system and strengthening the skin barrier from the inside out.

We reviewed the top allergy supplements on the market and narrowed it down to nine that actually deliver results. Whether your dog deals with seasonal flare-ups or year-round itching, one of these should help.

Top 11 Picks for Best Dog Allergy Supplements in 2023

1. 1. iHeartDogs Allergy & Itch Relief Chews for Dogs
   2. PetHonesty Dog Allergy Relief Chews Max Strength
   3. Zesty Paws Advanced Allergy Immune Supplement
   4. PetHonesty Allergy Anti-Itch Salmon Oil Supplement
   5. Vetnique DermaBliss Dog Allergy Chews
   6. PetAlive Allergy Itch Ease Granules
   7. Finn Allergy & Itch Supplement for DogsBEXLEY LABS Curaseb Medicated Treatment for Dogs
   8. PetArmor Antihistamine Allergy Relief for Dogs
   9. StrellaLab Allergy Relief with Omega-3 Dog Chews

 

1. iHeartDogs Allergy & Itch Relief Chews for Dogs

If your dog is dealing with irritated skin, the iHeartDogs Allergy & Itch Chews can soothe them. Using only the highest quality ingredients, the dog allergy chews provide relief while supporting a healthy immune system and aiding digestion for all-around canine health. These chews include a blend of natural ingredients that boost your dog’s immune system to help relieve seasonal, food, and environmental allergies that can cause itching, sneezing, scratching, skin irritation, and paw chewing.

This supplement is rich in omega-3 and omega-6 fatty acids, which support a healthy immune system, heart health, anti-inflammatory properties, healthy skin and coat, and cognitive function. Some of the other key ingredients include quercetin, colostrum, Reishi mushrooms, salmon oil, and apple cider vinegar. The recipe is veterinarian formulated, and every product purchased helps feed dogs in need.

Key Features:

• Helps alleviate itching and calms skin irritation
• Excellent multivitamin for multiple health benefits
• It has strong antioxidant and anti-inflammatory properties
• It helps promote healthy digestion, intestinal balance, and a strong immune defense

In a Nutshell:

These soft chews look, smell, and taste like treats for dogs, so they’re great supplements for picky eaters. However, it could take a while for the natural ingredients to take effect.

Pros

• Suitable for puppies
• Easy to serve
• Helps alleviate itching and calms skin irritation
• Veterinarian formulated
• Made in the USA
• Every purchase donates meals to shelter dogs

Cons

• May take a while to see results

---

2. PetHonesty Dog Allergy Relief Chews Max Strength

 

PetHonesty is dedicated to providing high-quality health supplements with natural ingredients. This company makes some of the best dog allergy supplements in the USA without sacrificing the quality of ingredients, manufacturing, and packaging.

This formula contains a blend of probiotics to “coat” the gut with good bacteria and support digestive functions. The supplements contain colostrum for immunity and fish oil for healthy skin and coat. Thus, each chew contains omega-3 fatty acids too. All the ingredients are natural, and the formula is recommended by vets.

Key Features:

• Supports normal and healthy inflammatory pathways
• Helps soothe seasonal allergy-related skin issues
• Helps support your dog’s immune system
• Made of colostrum, probiotics, coconut oil, and quercetin

Related: The Best Allergy Medicines for Dogs Reviewed

In a Nutshell:

Your dog should be monitored closely when taking these supplements for the first time, but most dog parents have noticed improvements in their sensitive pup’s skin, coat, and digestive system after eating them.

Pros

• All-natural ingredients
• Dog-friendly flavor
• Vet-approved formula
• Helps improve skin/coat health

Cons

• Some dogs experience digestive issues

---

3. Zesty Paws Advanced Allergy Immune Supplement

Taking care of our beloved furry friends is essential for their long-term happiness. Zesty Paws Advanced Aller-Immune Bites offer extra TLC for your canine companion, no matter their age or size. You can choose unique formulas for seniors, puppies, small dogs, and all ages. There’s also a vet-formulated option.

These supplements support immune function, help dogs with seasonal allergies, and help maintain histamine levels. The soft chews contain vitamins, protein, fiber, colostrum, omega-3 fatty acids, antioxidants, prebiotics, and probiotics. Together, the ingredients in this functional pet supplement support dogs with seasonal allergies, especially when it comes to immune, skin, and gut health.

Key Features:

• Each chew features five strains of probiotics and PreforPro (prebiotics)
• EpiCor is a premium ingredient made from natural yeast
• Advanced Aller-Immune Bites may also help maintain normal histamine levels

In a Nutshell:

Some dogs are picky with these chews, but dogs of all ages and breeds tend to experience decreased allergy symptoms after taking the supplements.

Pros

• No artificial flavors or preservatives
• Includes salmon oil
• Seasonal allergy support
• Supports gut function
• Formulas for dogs of all ages and sizes
• You can get 20% off your order on Zesty Paws’ website if you sign up for emails and texts

Cons

• Some reports of vomiting and lethargy

---

4. PetHonesty Allergy Anti-Itch Salmon Oil Supplement

PetHonesty Anti-Itch Allergy Supplement for Dogs is another liquid supplement. It combines the smells and flavors of salmon oil and turkey to appeal to picky pups. The supplement can be given directly, but it is easier to mix with food or treats.

This product has natural ingredients, including omega oils, colostrum, immune modulators, and probiotics, that work to soothe allergy-related itching and other skin conditions. The ingredients are free of allergens and common food sensitivity triggers like wheat, corn, preservatives, and GMOs. These supplements are a vet-recommended form of allergy support.

Key Features:

• Made with salmon oil, colostrum, and mushroom blend without fillers
• Helps support itchy and dry skin
• Supports skin, coat, joint, and immune health.
• Vet-recommended for skin, allergy, and immune support

In a Nutshell:

Since this is a natural supplement, it will take time for the ingredients to support the immune system, so don’t expect it to start working immediately. Despite the aroma of salmon oil and turkey, some dogs might not find the flavor appealing.

Pros

• Easy to use
• Natural ingredients
• Free from allergens
• Promotes skin health
• NASC quality seal of approval

Cons

• Takes time to offer full allergy support

---

5. Vetnique DermaBliss Dog Allergy Chews

Vetnique DermaBliss Dog Allergy Chews are designed to help dogs with hay fever or other allergic reactions. It uses a combination of omega fatty acids, vitamins, probiotics, quercetin, and colostrum. You can buy these supplements in packs of 30, 60, or 120, depending on how often your dog needs them.

Dermabliss benefits dogs with seasonal allergies, atopy, and other skin conditions by promoting normal inflammatory responses and supporting the immune system. The unique combination of omega-3-6-9 fatty acids helps support a healthy gut, which means a healthy pup. Fatty acids can also help keep your dog’s skin and coat healthy overall.

Key features:

• Helps “ditch the itch” by supporting dogs with allergies
• Made with natural ingredients, including salmon oil
• Combines immune modulators, probiotics, and colostrum

In a Nutshell:

Some pet parents complained that their dog would only eat it when mixed with food, but most customers saw improvement in their dog’s internal and external allergic reactions.

Pros

• Soft chews are easy to serve
• No artificial preservatives
• NASC quality seal of approval
• Rich in omega-3-6-9

Cons

• The strong smell might deter some dogs

---

6. PetAlive Allergy Itch Ease Granules

Help your furry friend feel strong and comfortable in their skin with PetAlive Allergy Itch Ease Granules. This homeopathic supplement relieves common skin irritations, including allergies, eczema, red spots, mottled skin, and itching.

Allergy Itch Ease is a natural remedy with ingredients that relieve itching and other allergic reactions. It works to promote healthy skin on all levels. Supporting sensory balance and proper oxygen supply can help strengthen the skin and even reduce licking and scratching behaviors that can worsen skin irritations. To use mix it with your pet’s food as directed.

Key Features:

• Combats itchy and irritable skin from allergies
• Supports the health of all cells and layers of the skin
• Homeopathic treatment
• Increases oxygen supply to the skin to help strengthen it and reduce itching

In a Nutshell:

Even though this supplement isn’t a soft treat like some of the others, it’s easy to serve because it can be mixed with your dog’s food for allergy relief.

Pros

• Relieves itchy skin
• Stops pets from scratching
• Soothes skin allergies
• Calms your pet

Cons

• Vague dosage instructions

---

7. Finn Allergy & Itch Supplement for Dogs

New to the dog supplement industry, Finn’s all-natural products are quickly becoming popular with puppy parents. These supplements have been extensively researched and formulated with real, natural ingredients without unnecessary fillers or artificial preservatives.

These supplements contain colostrum, wild Alaskan salmon oil, quercetin, bromelain, probiotics, bee propolis, and other key ingredients to help support your dog’s immune response and soothe itchy, dry skin. These chews are formulated to relieve seasonal allergies in dogs and are cold-pressed to preserve the strength of the ingredients. They contain real cheese, bacon, and beef liver, most dogs’ favorite flavors.

Key Features:

• Formulated to support seasonal allergies and skin health
• No corn, soy, or artificial ingredients
• NASC quality seal of approval

In a Nutshell:

Some customers have complained about the strong smell, but most dogs love it. It’s easy to serve because dogs think it’s a treat when it’s really reducing allergy symptoms.

Pros

• BPA-free, recyclable tin
• Made in the USA
• Suitable for puppies
• Vet-recommended
• Appealing flavors for dogs

Cons

• The smell is strong

8. PetArmor Antihistamine Allergy Relief for Dogs

This dog allergy supplement comes in unflavored pills, so you’ll likely need to crush the pills and mix them with wet food. A pill pocket may also be a good way to serve them. These supplements are an easy-to-use at-home solution to help relieve sensitive, itchy skin and soothe insect bites and stings.

PetArmor Antihistamine Medication for Dog Allergies contains diphenhydramine, the same compound found in Benadryl Ultra tablets. The antihistamine works to regulate and normalize histamine levels in your dog. While the tablets are designed to combat allergy symptoms, including seasonal allergies, they are also effective against insect bites. PetArmor also recommends these tablets for travel anxiety.

Key Features:

• The tablets are easy to swallow
• An excellent option for insect bites and stings
• Formulated with the same active ingredient as Benadryl Allergy Ultra Tablets
• It may be given to your canine to help ease travel anxiety

In a Nutshell:

Some users reported that the pills were difficult to give, but most of the dogs that took the supplement were happier and more comfortable.

Pros

• Effective for insect bites
• It can help combat itchy skin
• Affordable at-home treatment
• Suitable for all dog sizes

Cons

• It might be hard to give to picky dogs

---

9. StrellaLab Allergy Relief with Omega-3 Dog Chews

This supplement is designed to aid the digestive system, improve your dog’s immune system, and provide relief from uncomfortable allergy symptoms. This allergy-relieving immune treatment contains salmon oil rich in omega-3 fatty acids. Thus, the supplements are highly effective in tackling common seasonal and food allergy symptoms such as itching, shedding, or sneezing.

Each bite offers an exceptional blend of omega fatty acids, digestive enzymes, essential vitamins, and minerals, all promoting overall health from nose to tail. By encouraging a strong immune response and healthy digestion, these chews can help keep your dog’s allergies under control. They can relieve common symptoms, such as itching, redness, sneezing, and excessive paw licking. Plus, omega-3 fatty acids maintain healthy skin and a soft, shiny coat.

Key Features:

• Made in the USA
• No dangerous preservatives, flavor enhancers, or fillers
• Made with omega-3 fatty acids to help maintain healthy skin and a shiny coat
• Chicken-flavored soft chews take advantage of digestive enzymes

In A Nutshell:

It can be effective against skin allergies, insect bites, and other allergic reactions, and even picky dogs seem to love the flavor. However, some dogs may have difficulties digesting it.

Pros

• Made in top-quality facilities
• Boosts immune systems
• Easy-to-serve chews
• Effective for insect bites
• Can combat itchy skin

Cons

• Some dogs may not be able to digest it well

---

How to Choose the Right Allergy Supplement

Not all allergy relief products work the same way. Here’s what to look for:

• Omega-3 fatty acids: Reduce inflammation and support the skin barrier. Look for fish oil or salmon oil as a primary ingredient.
• Probiotics: A healthy gut microbiome plays a major role in immune response. Probiotic supplements help regulate how the body reacts to allergens.
• Quercetin: Often called “nature’s Benadryl,” this flavonoid acts as a natural antihistamine and anti-inflammatory.
• Colostrum: Supports immune function and helps modulate the body’s allergic response.
• Format: Soft chews are the most popular and easiest to dose. Liquids work for picky dogs. Tablets offer faster symptom relief but don’t address root causes.

Frequently Asked Questions About Dog Allergy Supplements

1. How do dog allergy supplements work?

Most allergy supplements work by supporting the immune system so it reacts less aggressively to allergens. Omega-3s reduce inflammation, probiotics balance gut health (which influences immune response), and ingredients like quercetin block histamine release naturally. They address the root cause rather than just masking symptoms.

2. How long does it take for allergy supplements to work?

Most supplements need 4 to 8 weeks of consistent daily use before you see significant improvement. Skin and coat changes happen gradually. Antihistamine tablets work faster (within hours) but only treat symptoms temporarily.

3. Can I give my dog human allergy medicine?

Some human antihistamines like Benadryl (diphenhydramine) and Zyrtec (cetirizine) are sometimes used for dogs, but dosing is different and not all formulations are safe. Never give your dog any medication without checking with your vet first. Some human allergy medicines contain xylitol or other ingredients toxic to dogs.

4. Can food allergies cause skin problems in dogs?

Yes. Food allergies commonly show up as skin issues: itching, ear infections, paw licking, and chronic hot spots. The most common food allergens for dogs are chicken, beef, dairy, wheat, and soy. An elimination diet guided by your vet is the best way to identify food triggers.

5. What vitamins help dogs with allergies?

Omega-3 fatty acids (EPA and DHA from fish oil) are the most effective. Vitamin E supports skin health and acts as an antioxidant. B vitamins support immune function and energy metabolism. Biotin strengthens the skin barrier and promotes coat health.

Helping Your Itchy Dog Find Relief

Allergies are manageable. The right supplement, paired with your vet’s guidance, can take a dog from constantly scratching to actually enjoying life again. Start with the supplement that matches your dog’s primary symptoms, give it a full 6 to 8 weeks, and track what changes. For dogs with severe allergies, combining a daily supplement with a medicated shampoo and allergen-reducing strategies at home produces the best results.

Your dog doesn’t have to live in discomfort. A few smart additions to their daily routine can make a real difference.

iHeartDogs is reader-supported. When you buy via links on our site, we may earn an affiliate commission at no extra cost to you.