Final answer:
A) Canine atopic dermatitis
Canine atopic dermatitis is more common than Feline atopic skin syndrome.
Step-by-step explanation:
The more common of the two skin disorders, Canine atopic dermatitis and Feline atopic skin syndrome, is Canine atopic dermatitis (Option A).
Canine atopic dermatitis is an allergic skin disease that affects dogs, while Feline atopic skin syndrome is a less common condition seen in cats. Canine atopic dermatitis is characterized by itching, redness, and recurrent skin infections. It is caused by an exaggerated immune response to certain allergens, such as pollen, dust mites, or food ingredients.
Although both conditions can cause discomfort and skin problems in affected animals, Canine atopic dermatitis is more widespread and frequently diagnosed in veterinary practice.