Demodex (Demodicosis) in Dogs
Demodex (Demodicosis) is a medium-severity dermatological condition that can affect dogs of all ages and breeds. Demodicosis is caused by overpopulation of Demodex canis mites normally present in hair follicles. Localised disease is common in puppies and often self-resolving. Generalised disease indicates immune compromise and can be severe and difficult to treat. It is documented across 6 breeds, though prevalence and severity can differ significantly between them. It typically becomes apparent at Under 18 months (juvenile) or adult with immune compromise. Early signs to watch for include hair loss (alopecia), redness and scaling, skin thickening and hyperpigmentation, and secondary bacterial infection (furunculosis). When treatment is required, costs are estimated at £300-£1,500 depending on severity, location, and the specific intervention needed. Demodex (Demodicosis) has a hereditary component, so health-screening certificates from the breeder are strongly recommended for predisposed breeds. This page covers symptoms, treatment options, and preventive steps — along with breed-specific information where available.
Signs & Symptoms
The following symptoms are commonly associated with Demodex (Demodicosis) in dogs. If your dog displays several of these signs, consult your vet promptly — early diagnosis typically leads to better outcomes.
- Hair loss (alopecia)
- Redness and scaling
- Skin thickening and hyperpigmentation
- Secondary bacterial infection (furunculosis)
- Pruritus (in secondary infection)
Treatment Overview
Isoxazoline class antiparasitic drugs (fluralaner, sarolaner, afoxolaner) are highly effective treatments. Underlying immunosuppression must be identified and addressed in adult generalised cases.
Typical onset: Under 18 months (juvenile) or adult with immune compromise
Prevention & Screening
While not all cases of Demodex (Demodicosis) can be prevented, the following steps reduce risk or enable earlier intervention:
- Do not breed from dogs with juvenile generalised demodex
- Maintain general health and immune system
Estimated Treatment Cost
Treatment for Demodex (Demodicosis) is estimated at £300-£1,500, depending on severity, the specific intervention required, and your location. Costs may be higher for surgical procedures or ongoing management. Comprehensive pet insurance covering hereditary conditions is strongly recommended.
Breeds Affected by Demodex (Demodicosis)
The following 3 breeds are documented as being susceptible to Demodex (Demodicosis). Click any breed to view breed-specific information about this condition, including prevalence and recommended screening.
Looking for more information? Browse all dog health conditions or explore the health guides for in-depth breed care advice.