Atopic dermatitis in dogs—commonly known as canine atopic dermatitis (CAD)—is more than just an itchy nuisance; it represents one of the most prevalent and challenging allergic skin conditions facing our canine companions today. Characterized by chronic pruritus (itching), erythema (redness), and recurrent skin infections, CAD arises when genetically predisposed dogs develop immunoglobulin E (Ig..