What Is Dog Pollen Allergy?
Canine pollinosis is a form of atopic dermatitis — an IgE-mediated hypersensitivity to environmental allergens (pollens, dust mites, mould spores). When the dog inhales or contacts pollens, the immune system overreacts, releasing histamine and inflammatory mediators that produce intense itching.
Unlike people, dogs don't sneeze or have nasal congestion as their main symptom: their reaction is predominantly cutaneous. If your dog scratches more in spring and improves in winter, pollen allergy is the top suspect.
Most Problematic Pollens and Their Seasons
- Cypress and cupressaceae: January-March — the year's first wave.
- Plane tree: March-May — very common in cities.
- Olive: May-June — dominant in southern Europe.
- Grasses: May-July — the most common cause of canine pollinosis.
- Mugwort/artemisia: August-September — the key autumn pollen.
Symptoms to Recognise
- Seasonal itching: clearly worsens in spring/summer, improves in winter — the most characteristic pattern.
- Intense scratching of the face (periocular area, muzzle), armpits, groin and paws.
- Paw-licking — paws stained reddish-brown from saliva.
- Recurrent otitis: red, smelly, dirty ears.
- Watery eyes and seasonal conjunctivitis.
- Secondary skin lesions from scratching: wounds, crusts, bacterial or Malassezia infections.
Diagnosis Step by Step
- Rule out parasites: complete antiparasitic treatment (fleas, mites).
- Elimination diet: 8-12 weeks with a novel protein (duck, venison, salmon) or hydrolysed diet. If itching improves → food allergy.
- If itching persists and is seasonal: veterinary dermatologist for intradermal or serological tests (pollen, mite, mould panel). Cost: £150-350.
Effective Treatments
- Apoquel (oclacitinib): relieves itching within 4 hours. The most widely used short/long-term treatment. Requires vet prescription.
- Cytopoint (lokivetmab): monthly injection — monoclonal antibody targeting IL-31, the itch cytokine. Very effective and well tolerated.
- Allergen immunotherapy: personalised vaccine with the pollens sensitising your dog. Takes 6-12 months for full effect but is the only disease-modifying treatment. Success rate: 60-70 %.
- Corticosteroids: effective short-term for acute flares, significant side effects long-term.
Reducing Pollen Exposure
- Walk early morning or at dusk (pollen counts are lower).
- Wipe paws and belly with a damp cloth after walks.
- Weekly baths with hypoallergenic shampoo to remove pollen from the coat.
- Keep windows closed on high pollen-count days.
- Omega-3 (EPA+DHA): 100-150 mg/kg/day — anti-inflammatory and improves skin barrier.
Related: atopic dermatitis in dogs, dog conjunctivitis.