Final answer:
Canine atopic dermatitis (cAD) is an allergic skin disease in dogs that causes itching and inflammation. It typically begins between 6 months and 3 years of age.
Step-by-step explanation:
Canine atopic dermatitis (cAD) is a type of hypersensitivity reaction in dogs that is similar to human eczema. It is an allergic skin disease that causes itching and inflammation. The age at which a dog may develop canine atopic dermatitis can vary, but it often begins between 6 months and 3 years of age. Some dogs may develop the condition later in life. Treatments often involve immunosuppressive and anti-inflammatory drugs.
In terms of canine atopic dermatitis (cAD), although not directly mentioned here, it is a common type of hypersensitivity found in dogs that typically manifests between the ages of 6 months and 3 years.