Dog Allergies in Spring in South Dakota: Timing, Triggers, Breeds, and Treatment

Spring arrives in South Dakota with warming temperatures, melting snow, and a burst of plant activity — and for many dogs, it also marks the start of allergy season. If your dog starts scratching, licking their paws, or shaking their head more than usual as the weather shifts, seasonal allergies may be the reason.

This guide walks you through everything you need to know about dog allergies in spring in South Dakota: when the season begins, what’s triggering your dog’s reaction, how to recognize the signs, which breeds are most vulnerable, and what your vet can do to help.

When Does Spring Allergy Season Start for Dogs in South Dakota

As a midwestern state, South Dakota experiences just about every season in its entirety, meaning you get hot summers, moderate falls and springs, and cold winters. This makes allergy season fairly typical, beginning in early spring and going until the first frost of winter.

For most dogs in South Dakota, allergy symptoms start becoming noticeable in March, with peak activity typically running through May and into early June. The exact timing depends on where you live in the state.

• The Hot Springs and Rapid City areas will have spring tree allergies from box elder, maple, willow, and ash trees.
• The Mobridge and Pierre areas kick off spring allergy season with tree pollen from box elder, oak, maple, willow, and ash trees.
• The Aberdeen, Watertown, and Mitchell spring tree allergies include maple, oak, ash, and willow trees.
• The Brookings and Sioux Falls areas will have spring allergies from walnut, box elder, maple, oak, ash, willow, and cedar trees.

South Dakota has an abundance of trees thanks to its wilderness, like the Black Hills National Forest. In spring, tree allergies are at their worst, with the culprits including ash, elm, birch, maple, oak, and willow. As spring transitions into early summer, grass allergy season begins, usually starting in May and going into July. Summer grass allergies in South Dakota may include bluegrass, ryegrass, timothy, Johnson, redtop, orchard, Bermuda, and fescue grass pollen.

Pro Tip: If your dog’s symptoms appear every spring and ease off in winter, that seasonal pattern is one of the strongest clues that environmental allergies — not food sensitivities — are the underlying cause.

What Causes Dog Allergies in Spring in South Dakota

Seasonal allergies in dogs, also known as atopic dermatitis, occur when a dog’s immune system mistakes harmless substances in the environment for threats. These reactions typically occur during certain times of the year, but timing varies depending on where you live, the allergens present, and the triggers to which your dog is sensitive.

The primary culprits behind springtime allergies in dogs include pollen from trees, grasses, and weeds, which can cause atopic dermatitis or airborne allergies. In South Dakota, the wide-open prairies, river valleys, and forested regions like the Black Hills create a diverse mix of pollen-producing plants that can affect sensitive dogs across the state.

Other environmental factors such as mold, dust mites, and even the dander of people or other animals can exacerbate your dog’s allergic reactions. Spring’s wet and warming conditions are especially favorable for mold growth, which adds another layer of allergen exposure for your dog.

Pollen particles are easily inhaled or can stick to your pet’s fur, causing reactions when they’re absorbed through the skin or licked during grooming. Mold spores that flourish in damp spring environments and dust mites that become more active as temperatures rise are also common culprits.

Unlike food allergies, which cause digestive issues, seasonal allergies primarily affect the skin and respiratory system. Understanding this distinction helps you narrow down what’s causing your dog’s discomfort and get them the right kind of help. You can also explore venomous animals in South Dakota that may cause reactions sometimes mistaken for allergies.

Key Insight: South Dakota’s diverse landscape — from Black Hills forests to eastern prairie grasslands — means dogs in different parts of the state are exposed to different allergen profiles. A dog in Rapid City may react primarily to tree pollen, while one in Sioux Falls may have a stronger response to grass pollen.

Signs Your Dog Has Spring Allergies in South Dakota

Seasonal allergies manifest themselves differently in dogs than they do in humans, which may make it more challenging to identify. There are a few common symptoms of spring allergies in dogs you can watch for.

Itchy skin and recurrent ear infections are the most common signs of seasonal allergies in dogs, but your pet may also experience red, swollen eyes, a clear, runny nose, and fits of sneezing. The itchiness your pet may experience can range from intense to mild, and is most likely to occur in the armpit, groin, muzzle, or paw regions.

Here are the key symptoms to watch for:

• Excessive scratching or licking — Especially around the paws, belly, ears, and face
• Paw chewing or foot licking — A very common and often overlooked sign of environmental allergies
• Recurrent ear infections — If your dog is scratching their ears or continuously shaking their head back and forth, they could have an ear infection. Additional signs of ear infections include inflammation and redness in the ears.
• Sneezing — It is normal for your dog to sneeze on occasion, but excessive sneezing is a common side effect of seasonal dog allergies.
• Watery or red eyes — Ocular discharge or conjunctivitis can accompany seasonal flares
• Hair loss or hot spots — From repeated scratching or licking in one area
• Skin odor — When allergies occur, the skin produces more sebum, which is an oily material that causes a musty odor. Once the itching and scratching are controlled, the odor and seborrhea should clear up.

Skin irritation and discomfort lead to excessive scratching, biting, or licking, resulting in open wounds or infections that can further degrade your dog’s well-being. These reactions can cause systemic discomfort, such as gastrointestinal upsets in some cases, and behavioral changes due to the constant irritation and discomfort.

Important Note: Secondary infections are a serious concern with allergic dogs. When your dog scratches or licks persistently, they break down the skin barrier, allowing bacteria and yeast to move in. If you notice a musty odor, greasy skin, or darkened patches in chronically affected areas, a secondary infection may have developed and will need its own treatment.

If you notice these symptoms appearing each spring and easing as the season ends, that recurring pattern strongly points toward seasonal environmental allergies rather than a food issue or other condition. You may also want to rule out mosquitoes in South Dakota and caterpillars in South Dakota as potential sources of localized skin reactions that can mimic allergy symptoms.

Which Dog Breeds Are Most Prone to Spring Allergies

There isn’t a single breed that is most prone to allergies, but research shows that certain breeds are diagnosed with allergic skin disease (canine atopic dermatitis) more often than others. These breeds include Labrador retrievers, golden retrievers, West Highland white terriers, French bulldogs, boxers, Chinese shar-peis, and others. This increased risk is thought to be partly due to inherited genetic factors that affect the immune system, though environmental influences also play a role.

Certain dog breeds are more prone to atopy, including boxers, English bulldogs, cocker spaniels, French bulldogs, fox terriers, German shepherds, golden retrievers, Irish setters, Labrador retrievers, poodles and poodle crosses, shar peis, vizslas, and West Highland white terriers.

Here’s a closer look at some of the most commonly affected breeds:

Any dog, purebred or mixed, can develop allergies. If you own one of the higher-risk breeds, it’s worth being proactive about monitoring for symptoms each spring and discussing a prevention plan with your vet before allergy season peaks. See how spring allergies compare in neighboring states like Colorado or check out Arkansas for a different regional perspective.

Pro Tip: Allergy symptoms in dogs typically develop between 6 months and 3 years of age. If your young dog from a high-risk breed starts showing signs of itching or recurring ear infections in their first or second spring, don’t dismiss it as a one-time issue — early intervention leads to better long-term outcomes.

How Vets Diagnose Seasonal Allergies in Dogs in South Dakota

Your dog’s vet can diagnose seasonal allergies by discussing your pet’s history with you, performing a physical examination, running several diagnostic tests, and monitoring your dog’s treatment response to therapies.

Bringing a symptom diary to your appointment makes a real difference. Note when symptoms started, which body areas are affected, whether they worsen after outdoor time, and any treatments you’ve already tried. This information helps your vet distinguish seasonal allergies from food sensitivities, flea allergy dermatitis, or skin infections.

After the initial exam, your vet may recommend one or more of the following diagnostic approaches:

1. Intradermal (skin) allergy testing — Skin testing is usually performed by a board-certified veterinary dermatologist, who measures your pet’s reaction to microdoses of different allergens to determine exactly which they’re allergic to.
2. Serologic (blood) allergy testing — Serologic testing is generally considered less reliable than intradermal testing; however, it is often less expensive and does not require sedation, making it a viable option in some cases.
3. Elimination and monitoring — Your veterinarian can use skin testing to identify the specific cause of your pet’s allergy; however, unlike food allergies, it’s inevitable that your pet will be exposed to it. Tracking when and where symptoms occur helps narrow down the triggers.
4. Referral to a veterinary dermatologist — Your vet may also recommend a specialist veterinary dermatologist for skin testing. These specialists can offer a more accurate way to diagnose and treat your pet’s allergies.

Your vet can assess if the itch is from environmental allergies or another problem such as flea allergies, food allergies, skin infections, or mites. Getting the diagnosis right matters — treating for the wrong cause means your dog continues to suffer unnecessarily.

Common Mistake: Assuming your dog has food allergies just because they’re itchy. In spring, environmental allergens like tree and grass pollen are far more likely culprits. Your vet can help rule out food sensitivities through a structured elimination diet if needed.

How to Treat Spring Allergies in Dogs in South Dakota

To treat seasonal allergies in dogs, your vet may recommend an anti-itch medication, topical treatment, shampoo, omega fatty acid supplements, or, in more severe cases, immunotherapy. The right combination depends on your dog’s symptom severity and how long allergy season affects them.

Here are the main treatment options your South Dakota vet may discuss with you:

• Apoquel (oclacitinib) — Oclacitinib (Apoquel®) is an oral medication that’s among a new generation of highly effective anti-itch medications for dogs, blocking the itch right at its source, quickly and safely.
• Cytopoint — Another anti-itch medication labeled for dogs is lokivetmab (Cytopoint®). Cytopoint® is injectable, takes effect within one to three days, and lasts for one to two months.
• Immunotherapy (allergy shots) — In some cases, it may be possible to desensitize your pet to the offending allergens through a series of “allergy shots” or allergen-specific immunotherapy (ASIT). To receive allergy shots, your pet would need to undergo testing with a dermatologist to determine what your pet is allergic to. Improvement can take six months to one year, so dogs taking allergy shots often receive other treatments in the meantime.
• Steroids — Steroids like prednisone or prednisolone might be prescribed short-term for severe allergy cases. Steroid use increases hunger, thirst, and urination. Long-term steroid use may weaken the immune system, cause Cushing’s disease, and contribute to diabetes. Because of the dangerous long-term effects of steroids, systemic steroids should only be used for short-term control of symptoms.
• Antihistamines — Antihistamines are often used, but they’re not as effective for dog and cat seasonal allergies compared to other treatments. They may offer mild relief for dogs with less severe symptoms.
• Omega-3 fatty acid supplements — It takes four to six weeks for an omega-3 fatty acid supplement to become effective, so it is best for a dog with seasonal allergies to be on this supplement year-round.
• Medicated shampoos — Frequent bathing with a hypoallergenic shampoo can be soothing to itchy, inflamed skin. Some shampoos are available over the counter, while others may require a prescription. Bathing also removes allergens from the skin and coat.
• Topical treatments — Topical therapy can be used to soothe the skin and help with treatment of skin infections. There are many topical therapy options, including anti-bacterial and anti-fungal ointments, shampoos, conditioners, mousses, sprays, and wipes.

A common mistake is waiting until your dog is in significant distress before starting treatment. For dogs with known spring allergies, starting medications like Apoquel or Cytopoint before the season peaks — rather than after symptoms are already severe — typically produces much better outcomes.

For dogs in other states, you can compare treatment approaches in our guides for Georgia, Florida, and California.

How to Reduce Your Dog’s Exposure to Spring Allergens in South Dakota

Managing your dog’s environment is just as important as medication. The goal is to reduce how much allergen your dog contacts each day, which can lower the intensity of their symptoms and sometimes reduce how much medication they need.

After outdoor time:

• Since pollen and dust cling to your dog’s fur and paws, wiping them down with a damp cloth or pet wipes after walks can help reduce allergy flare-ups.
• Give your dog regular baths during the spring to keep their fur and skin clear of any irritants. Use a soothing, oat-based dog shampoo to help calm your dog’s skin if they are itching.
• Pay extra attention to paws, belly, and ear flaps — these areas collect the most pollen during outdoor activity.

Timing your walks:

• Adjust your daily walk to avoid areas with too many pollen-producing plants. You should also avoid taking your dog for a walk when pollen levels are high. Pollen levels are typically at their highest in the morning and on dry, warm days.
• Aim for walks in the late afternoon or after rain, when pollen counts tend to be lower.

Inside the home:

• Vacuum frequently, wash your dog’s bedding weekly, and use air purifiers to reduce allergens in your home.
• If possible, use air-conditioning rather than opening windows during pollen season.
• Air purifiers help improve air quality in your home by capturing and eliminating some common contaminants that may contribute to your pet’s allergies. Place your air purifier in the room your dog spends most of their time.
• Switch to hypoallergenic bedding to minimize allergen buildup.

Diet and supplements:

• A well-balanced diet can strengthen skin barriers and reduce inflammation caused by allergies. Consider omega-3 fatty acids — found in fish oil — which help reduce itching and inflammation, and antioxidants, which support immune health and minimize allergic reactions.

Pro Tip: Check your local South Dakota weather forecast for daily pollen counts. Many weather apps and sites now include pollen index readings. On high-count days, keep outdoor time brief and focus on indoor enrichment activities for your dog.

South Dakota’s wildlife and insects can also occasionally trigger skin reactions in dogs. If you notice a sudden localized swelling rather than diffuse itching, a bug encounter may be the cause rather than pollen. You can also explore our guide to dangerous animals in Colorado Springs for a regional comparison of outdoor hazards to pets.

When to See a Vet About Your Dog’s Spring Allergies in South Dakota

Mild seasonal sneezing or occasional paw licking may not require an urgent vet visit, but there are clear signals that your dog needs professional care sooner rather than later.

Schedule a vet appointment if your dog shows any of the following:

• Scratching or licking that is constant or severe enough to break the skin
• Recurring ear infections that keep coming back each spring
• Hot spots, open sores, or hair loss from self-trauma
• A musty odor, greasy skin, or darkened skin patches — signs of a secondary yeast or bacterial infection
• Chronic allergies that have led to persistent ear infections, skin diseases, or respiratory problems
• Symptoms that do not improve after two weeks of at-home management

Seek emergency care if your dog experiences:

• Sudden facial swelling, hives, or difficulty breathing — these may indicate an acute allergic reaction requiring immediate treatment
• Vomiting or collapse following exposure to an outdoor allergen or insect sting

Early intervention is key to preventing complications and keeping your dog healthy and happy during the allergy season. Self-diagnosing your dog’s allergies and relying solely on home remedies can delay effective treatment and relief.

Your veterinarian can perform allergy testing, prescribe medications that offer more targeted relief than OTC options, and recommend dietary changes or supplements that support skin health. Building a relationship with your vet before allergy season peaks gives you a head start on managing your dog’s comfort throughout spring.

If you’re curious how spring allergy season compares in other states, explore our guides for Alabama, Connecticut, Delaware, and Arizona.

Key Insight: Seasonal allergies in dogs are manageable, not curable. The goal is to reduce your dog’s discomfort to a level where they can enjoy a good quality of life. With the right combination of veterinary care, at-home management, and environmental adjustments, most allergic dogs do very well through spring and beyond.