Bilateral lower palpebral demodicosis in a dairy cow

A registered 3 year old Guernsey heifer, recently fresh, was examined for sudden appearance of diffuse, firm swelling beneath both eyes. Vital signs and physical examination were within normal limits; no lymphadenopathy was present. Biopsy revealed a chronic eosinophilic granulomatous cellulitis and degenerate Demodex bovis. the lesions selfresolved within three months.