My girl has suffered from contact dermatitis, flea allergy dermatitis and general skin sensitivity. After perhaps 2 washes with this product, and she barely scratches herself anymore. They are more of a habit that requires breaking than actual itching. I would generally recommend another product for flea and tick control. But outside of that, this has been a purchase that was well worth it. Zero reactions to external allergens, which is so great to see after an entire year of itching!!