The most likely cause in a 2-year-old cocker spaniel dog is a primary disorder of keratinization. The nasal digital hyperkeratosis and scaling in the hair coat are also compatible with a disorder of keratinization. | The most likely cause in a 2-year-old cocker spaniel dog is a primary disorder of keratinization. The nasal digital hyperkeratosis and scaling in the hair coat are also compatible with a disorder of keratinization. |