Section 1: Basics. Epidermis in clinical dermatology -- Lesion description/terminology -- Diagnostic culture and identification (bacterial and fungal) -- Obtaining a diagnostic biopsy -- Practical cytology -- Symptom checker (lesional and regional dermatoses) -- Antibiotic stewardship and emerging resistant bacterial infections -- Section 2: Diseases/disorders. Acne (canine and feline) -- Anal furunculosis/perianal fistula -- Anal sac disorders -- Atopic disease -- Autoimmune blistering diseases -- Bacterial pyoderma -- Behavioral or self-injurious dermatoses -- Biting and stinging insects -- Contact dermatitis -- Cutaneous adverse drug reaction, erythema multiforme, Stevens-Johnson syndrome, and toxic epidermal necrolysis -- Cutaneous adverse food reactions -- Demodicosis (canine and feline) -- Dermatomyositis, canine familial -- Dermatophytosis -- Endocrinopathies, atypical -- Eosinophilic disease (granuloma) complex -- Epitheliotropic (cutaneous) lymphoma -- Histiocytic proliferative disorders -- Hyperadrenocorticism, canine -- Hyperadrenocorticism, feline skin fragility syndrome -- Hypothyroidism -- Keratinization (cornification) disorders -- Leishmaniasis: protozoan dermatitis -- Lupus erythematosus -- Malassezia dermatitis -- Mast cell tumors -- Mycobacterial infections -- Mycoses, deep -- Nocardiosis and actinomycosis -- Otitis externa, media, and interna -- Panniculitis -- Photodermatoses -- Pododermatitis and claw disorders -- Pre- and paraneoplastic syndromes -- Sarcoptid mites -- Sebaceous adenitis, granulomatous -- Sporotrichosis -- Superficial necrolytic dermatitis -- Tumors, common skin and hair follicle -- Uveodermatologic syndrome -- Vasculitis -- Viral dermatoses -- Zoonosis -- Appendices. Canine genodermatoses -- Drug formulary.