A 9-week-old Rottweiler-mix puppy is beign evaluated because of an itchy rash around the lips and eyelids. Temperature is 103.3*F. Physical examination shows swellign of the muzzle, pruritic, exudative pustiles around the lips and eyelids, and swelling of the submandibular lymph nodes bilaterally. Which of the following is the most appropriate treatment?
a. Cephalexin and prednisone
b. Clindamycin and carprofen
c. Enrofloxcin and etodolac
d. Topical amitraz
e. Topical betamethasone