Animaderm Summer Eczema Lotion For Sensitive Skin Derfen OriginalLotion that instantly soothes irritated and scratched skin following summer eczema flare ups. The ingredients of Derfen Original form a perfectly formulated botanical complex that helps restore the skin's natural resources, instantly calm irritation caused by scratching, and reduce oxidative stress on the skin. The feeling of tightness disappears. For horses with sensitive skin. Long lasting efficacy (37 days).