Dog Allergies:

Dog Allergies: Causes, Symptoms, and Why They Might Be on the Rise

If your dog is constantly scratching, licking their paws, or suffering from ear infections, allergies might be to blame. Just like humans, dogs can develop allergies to all sorts of things—from pollen to their favorite treats. But why does this happen? And are dog allergies becoming more common?

From our own experience, we only had a few minor issues with allergies over the years. For example, Cersei would occasionally get runny eyes during the spring and summer, but her symptoms were relatively mild, and we never had any problems with dietary products. That all changed with our last two pups. Both have experienced allergy issues—one with both food and environmental triggers, and the other with just environmental. Interestingly, they each show very different symptoms.

I definitely think this is a growing concern for dog parents everywhere, and it’s something worth looking into further.

In This Blog, We’ll Explore:

• Allergy or intolerance?

• What causes dog allergies

• Common symptoms to watch for

• Possible long-term effects if left untreated

• Why allergies may be increasing in dogs

• How to help your itchy pup feel better

Let’s dig in!

Is It an Allergy or an Intolerance?

Allergies and intolerances in dogs can look pretty similar, but they’re actually quite different. An allergy is when your dog’s immune system overreacts to something—like pollen, dust, or even a certain food—and causes symptoms like itching, ear infections, or an upset stomach. A food intolerance, on the other hand, doesn’t involve the immune system at all. It usually means your dog just can’t properly digest something, like dairy or certain grains, which can lead to gas, bloating, or runny poops. So while both can be uncomfortable for your pup, figuring out which one you're dealing with can really help when it comes to finding the right solution.

Figuring out whether your dog has an allergy or an intolerance can take a bit of detective work. Allergies often show up as skin issues—like itching, redness, or recurring ear infections—because they trigger an immune response. Intolerances, on the other hand, usually cause digestive upset like gas, bloating, or diarrhoea.

How Can You Tell If It’s an Allergy or an Intolerance?

While an elimination diet is one of the best ways to identify food issues, there are other helpful methods to figure out what’s going on with your pup.

• 🧪 Allergy Testing
  Vets can run allergy tests—either skin tests or blood tests—to check for reactions to environmental triggers like pollen, dust mites, or mold. These are more reliable for environmental allergies than food-related ones.

• 📋 Track Symptoms
  Keeping a symptom diary can really help. Note when symptoms appear, what your dog ate, and where they’ve been. For example, if your dog gets itchy after walks, it could be environmental. If they get gassy or have loose stools after certain meals, an intolerance might be the issue.

• 🧫 Gut Health Testing
  Some vets offer microbiome or gut health tests, which can reveal imbalances linked to food sensitivities. While not a direct allergy test, it can offer clues about what your dog can or can’t tolerate.

• 💊 Treatment Response
  Sometimes vets use a trial approach. If symptoms improve with antihistamines or anti-itch meds, it’s likely an allergy. If symptoms only improve after cutting out certain foods, it may point to an intolerance.

What Causes Allergies in Dogs?

An allergy is an overreaction of the immune system to a normally harmless substance (an allergen). When a dog’s body mistakes something like pollen or chicken protein for a threat, it releases histamines, leading to itching, inflammation, and other symptoms.

Dog allergies generally fall into three main categories:

1. Environmental Allergies (Atopic Dermatitis)

These are triggered by airborne or contact allergens, such as:

• Pollen (grass, trees, weeds)

• Dust mites

• Mold spores

• Flea saliva (even a single bite can cause a reaction!)

Some breeds—like Labradors, Golden Retrievers, and Bulldogs—are more prone to environmental allergies.

2. Food Allergies

Contrary to popular belief, true food allergies are less common than environmental ones. When they do occur, they’re usually triggered by proteins like:

• Beef

• Chicken

• Dairy

• Eggs

• Wheat or soy

(Note: Food intolerances—like lactose intolerance—are different and don’t involve the immune system.)

3. Contact Allergies

These happen when a dog’s skin reacts to something they touch, such as:

• Certain shampoos or cleaning products

• Fabrics (like wool or synthetic materials)

• Rubber or plastic (from food bowls or toys)

Symptoms of Allergies in Dogs

Allergies can show up in different ways, but the most common signs include:

• Excessive scratching, licking, or chewing (especially paws, ears, and belly)

• Red, inflamed skin or rashes

• Recurrent ear infections (often yeast or bacterial)

• Sneezing, watery eyes or a runny nose

• Digestive issues (vomiting, diarrhoea—more common with food allergies)

• Hair loss or hot spots

If your dog has seasonal symptoms, it’s likely environmental. If symptoms persist year-round, food or indoor allergens (like dust mites) could be the culprit.

What Happens if Allergies Go Untreated?

Ignoring allergies can lead to bigger problems, including:

• Chronic skin infections – Constant scratching breaks the skin, allowing bacteria and yeast to thrive.

• Ear damage – Repeated ear infections can lead to hearing loss or painful, thickened ear canals.

• Behavioral changes – A constantly itchy dog may become irritable, restless, or even depressed.

• Secondary health issues – Long-term inflammation can weaken the immune system, making dogs more prone to other illnesses.

The good news? Most allergies can be managed with the right approach!

Are Dog Allergies Becoming More Common?

Many vets and pet owners report seeing more allergy cases than ever before. While research is still ongoing, possible reasons include:

1. Overuse of Processed Dog Foods

Modern kibble often contains fillers, artificial additives, and repetitive protein sources, which may contribute to sensitivities over time.

2. The "Hygiene Hypothesis"

Just like in humans, dogs raised in ultra-clean environments may have weaker immune systems, making them more prone to allergies.

3. Increased Awareness & Diagnosis

Vets are better at recognizing allergies now, so what once might have been dismissed as "just a scratchy dog" is now properly diagnosed.

4. Genetic Factors

Some breeds are predisposed to allergies, and irresponsible breeding practices may be amplifying these tendencies.

How to Help a Dog With Allergies

1. Identify the Trigger

• For food allergies: Try an elimination diet (usually a novel protein like duck or venison) for 8-12 weeks, There are many hypoallergenic veterinary diets available.

• For environmental allergies: Allergy testing (blood or skin tests) can help pinpoint the cause.

2. Manage Symptoms

• Antihistamines (like Piriton—but only under vet guidance!)

• Medicated shampoos to soothe skin

• Omega-3 fatty acids (fish oil supplements can reduce inflammation)

• Prescription medications (Apoquel, Cytopoint, or steroids for severe cases)

3. Reduce Exposure

• For dust mites: Wash bedding weekly, use hypoallergenic covers.

• For pollen: Wipe paws after walks, keep windows closed during high-pollen seasons.

• For fleas: Use year-round flea prevention this can also include natural products.

4. Strengthen the Skin Barrier

A healthy diet with probiotics, zinc, and vitamin E can support skin health.

Disclaimer:

This blog is intended for general information only and does not constitute veterinary advice. If you have any concerns about your dog’s health or suspect an allergy or intolerance, please consult a qualified veterinary professional. Always follow the guidance of your vet when it comes to diagnosis, treatment, and dietary changes.

Final Thoughts: Living With an Allergic Dog

Allergies can be frustrating—for both you and your pup—but they don’t have to ruin your dog’s quality of life. With patience and the right care, most dogs can live happy, itch-free lives.

If you suspect allergies, speak with your vet to create a tailored plan. And remember, you’re not alone—millions of dog owners are going through the same thing!

Does your dog have allergies? What’s helped them the most? Let us know in the comments!

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