dWhen presented with demodicosis in dogs, considerations should include the case history (juvenile demodicosis or adult-onset demodicosis), clinical signs (localised or generalised demodicosis, dry or purulent demodicosis), in order to establish a prognosis. The principal agents used for canine demodicosis are: amitraz, ivermectin, milbemycin oxime, moxidectin: it is advisable to know the dosage, method of administration and side-effects of these. A treatment follow-up by skin scrapings is suggested (6 photos, 1 figure, 4 boxes, 1 table, 46 references).