Grass Allergy in Dogs: Symptoms, Causes & Treatment

For many dogs, the simple pleasure of rolling in fresh grass can turn into an uncomfortable ordeal. Grass allergies in dogs are among the most common environmental allergies that affect our canine companions.¹

Understanding how to recognize and treat grass allergies in dogs can help you keep them comfortable and healthy.

• Grass Allergy Symptoms in Dogs
• What Causes Grass Allergies in Dogs?
• Diagnosing & Treating Grass Allergies in Dogs
• FAQs
• Final Notes

Grass Allergy Symptoms in Dogs

When your dog has allergies, their immune system responds differently to everyday environmental factors. Dogs typically show allergic reactions through their skin rather than respiratory symptoms like humans do.²

Common symptoms of grass allergies in dogs include:^2,3

• Excessive scratching and itching, particularly at the paws, belly, and ears
• Red, inflamed skin that may develop into a belly rash
• Chewing or licking at their paws
• Hair loss in affected areas
• Ear infections
• Development of dandruff or dry, flaky skin
• Hot spots or areas of inflamed skin

Unfortunately, these symptoms can appear seasonally or year-round, depending on where you live and the specific types of grass affecting your pet.²

Dogs with allergies can also develop secondary infections due to scratching, licking, and skin inflammation.¹ These infections can create discomfort and worsen skin symptoms, causing scabs and hair loss.¹ They require specific antibiotic treatments.

What Causes Grass Allergies in Dogs?

Several common grass varieties can trigger allergic reactions in sensitive dogs, especially during peak growing seasons. The main culprits are:

• Bermuda grass
• Fescue
• Rye grass
• Alfalfa

These grasses release tiny pollen particles that can affect dogs in multiple ways. Much like their reactions to tree pollens (such as cedar, pine, and oak) or weed pollens (like ragweed and pigweed), dogs can experience significant discomfort when exposed to grass allergens.³

Dogs can encounter grass allergens just about anywhere, including:

• Direct contact: Active dogs who love rolling in grass can experience immediate skin reactions when their bodies come in contact with allergens.
• Airborne exposure: Even dogs who don't directly interact with grass can inhale pollen particles during walks or while spending time outdoors. These microscopic particles can travel significant distances through the air.
• Indoor exposure: Surprisingly, grass allergies can affect dogs even when they're inside. Pollen can enter indoor spaces through open windows or attach to clothing and shoes, creating year-round exposure risks.

Peak allergy seasons typically occur during spring and fall, when grass growth is most active. During these periods, you might notice yellow pollen dust in the environment — a visible sign that your dog may be at a higher risk for allergic reactions.

The allergic response begins when pollens contact your dog’s:

• Mucous membranes (nose, eyes, mouth)
• Skin surface
• Paw pads

Diagnosing & Treating Grass Allergies in Dogs

Vets are methodical when they diagnose dog grass allergies. They'll start with a thorough exam and review your pet's medical history. A few methods your vet might use to diagnose your dog's grass allergy are:

• Physical examination and history: Your veterinarian examines your dog's skin condition and discusses the timeline of symptoms, including any seasonal patterns or environmental factors that seem to trigger reactions.³
• Intradermal skin testing: During this procedure, your veterinarian injects small amounts of potential allergens under your dog's skin to monitor for reactions. This method is considered the most accurate way to identify specific grass allergies.¹
• Blood testing: This method measures antibodies your dog's immune system produces in response to various different allergens. Blood tests can be done during regular vet visits and don't require stopping allergy medications beforehand.¹

Once your dog is diagnosed with a grass allergy, your vet will build a treatment and management plan. Here's how to treat grass allergies in dogs:

• Medications: Your vet may recommend antihistamines, steroids, or other medications to help control itching and reduce inflammation. These medications can provide quick relief during allergy flare-ups.³
• Immunotherapy: Custom-made allergy shots or oral drops can help desensitize your dog to specific grass allergens over time. This treatment typically takes several months to show full effectiveness.⁴
• Medicated shampoos and topical treatments: Special shampoos, conditioners, and sprays can soothe itchy, irritated skin and remove allergens from your dog's coat. Regular bathing with these products can provide significant relief.³
• Skin barrier support: Supplements like omega-3 fatty acids or specific diets can help strengthen your dog's skin barrier and reduce allergic reactions. Your vet may recommend specific supplements based on your dog's needs.³
• Environmental management: Creating a plan to minimize exposure to grass allergens through regular cleaning, wiping paws after walks, and using protective gear when outdoors. This might include protective boots or clothing during high-pollen seasons.³

FAQs

How can you tell if your dog is allergic to grass?

As a pet parent, knowing if your dog has an allergy can be challenging. Even after realizing they're itchier than usual, identifying what they're allergic to is even more difficult. Ultimately, you need to carefully observe your dog's behavior and physical symptoms, particularly after outdoor activities.

The most common sign of grass allergies in dogs is excessive scratching, especially after walking through or lying in grass. You might notice your dog rubbing their face against furniture or the floor, or obsessively licking and chewing their paws.

Pay attention to when these symptoms occur — grass allergy symptoms often worsen during peak grass growing seasons in spring and fall. Watch for redness or inflammation between the toes, on the belly, or in the ear canals, as these areas frequently show the first signs of allergic reactions.

If you notice your dog itching with no fleas present, and the symptoms seem to worsen after grass exposure, these could be strong indicators of a grass allergy. Keep in mind that symptoms might not appear immediately after grass contact, making it even more difficult to pinpoint.

Can you give your dog antihistamines for grass allergies?

While you can give dogs certain antihistamines for everything from grass to bee allergies, it's crucial to consult with your veterinarian before starting any medication. Not all human antihistamines are safe for dogs, and dosing can be tricky.

Your veterinarian can recommend specific antihistamines that are safe for your dog and provide proper dosing instructions based on your pet's weight and overall health condition. Some dogs respond well to antihistamines, while others might need different medications or a combination of treatments.

Never give your dog any medication without first talking to your veterinarian, as improper dosing can be dangerous. Your vet might also recommend specific formulations designed for pets rather than human medications, as these are often more effective for treating allergy symptoms in dogs. If antihistamines alone don't provide enough relief, your vet might suggest additional treatments to complement the antihistamine therapy.

What is the best medicine for grass allergies?

The most effective medicine for grass allergies varies depending on your dog's specific symptoms and the severity of their allergic reactions. Veterinarians often recommend a combination of treatments rather than a single medication.

Immunotherapy through allergy shots or sublingual drops is one of the most effective long-term solutions, as it helps your dog build tolerance to grass allergens over time.

For immediate relief, your veterinarian might prescribe medications like Apoquel or Cytopoint, which specifically target the itch response and can provide quick relief from allergy symptoms.

Corticosteroids might be prescribed for severe cases but are typically used in the short-term due to potential side effects. Some dogs benefit from supplements like omega-3 fatty acids or probiotics, which support skin health and immune function.

Your vet will create a personalized allergy treatment plan based on your dog's specific needs.

How can I avoid grass if my dog has allergies?

While completely avoiding grass isn't practical for most dogs, there are several effective strategies to minimize exposure and reduce allergic reactions. Create a designated play and potty area in your yard using artificial turf, mulch, or gravel.

When walking your dog, stick to paved paths or sidewalks during peak pollen seasons. Consider using protective gear like dog boots or clothing. After outdoor activities, wipe your dog's paws, belly, and other exposed areas with pet-friendly hypoallergenic wipes to remove pollen and other allergens.

Regular bathing with a veterinarian-recommended shampoo can help remove allergens from your dog's coat. Inside your home, use high-efficiency air filters to reduce airborne allergens, and vacuum frequently with a HEPA-filter vacuum cleaner.

Keep your windows closed during the spring, summer, and fall, and consider using an air purifier in areas where your dog spends most of their time. You can also check local pollen forecasts to plan outdoor activities when grass pollen levels are lower.

Final Notes

Living with grass allergies doesn't mean your dog can't enjoy the outdoors. With proper allergy treatment for dogs, most dogs can have a good quality of life.

If you think your dog has grass allergies, try Dutch for convenient access to veterinary care. Our online pet pharmacy and veterinary services connect you with licensed veterinarians who can help diagnose and treat your pet's allergies from the comfort of your home. With features like virtual consultations and prescription delivery, managing your dog's grass allergies has never been easier.

Want to get started? Sign up for a Dutch membership today.