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Dogs & Cats

Flea Allergy Dermatitis

infoResearch indicates: Flea allergy is the most common skin disease in dogs and cats worldwide
info This article is for educational purposes only and does not replace professional veterinary advice. Always consult your veterinarian before making changes to your pet's diet or exercise routine.

descriptionOverview

Flea allergy dermatitis (FAD) is an allergic reaction to proteins in flea saliva. A single flea bite can trigger intense itching that lasts for days in sensitized pets. It's the most common cause of skin disease in dogs and cats. The key is that you may never see a flea — allergic pets groom so aggressively they remove the evidence. Even indoor pets can be affected.

searchSymptoms to Watch For

  • warningIntense scratching and biting, especially at the tail base and hind legs
  • warningHair loss and red skin on the lower back and thighs
  • warningSmall, crusty bumps (miliary dermatitis in cats)
  • warningHot spots from self-trauma
  • warningRestlessness and irritability

restaurantHow Nutrition Helps

While nutrition can't prevent flea bites, omega-3 fatty acids reduce the inflammatory allergic response to flea saliva, lessening symptom severity. A strong skin barrier (omega-6, zinc) heals damaged skin faster. Supporting immune balance through proper nutrition helps modulate the overactive allergic response.

verifiedPrevention Tips

  • check_circleYear-round flea prevention — no breaks, no gaps
  • check_circleTreat ALL pets in the household, not just the one showing symptoms
  • check_circleWash pet bedding weekly in hot water
  • check_circleVacuum frequently to remove flea eggs
  • check_circleTreat your yard if outdoor fleas are a problem