Mites are tiny arachnids belonging to the subclass Acari that, unlike ticks, typically complete their entire life cycle on or very near the host. Dozens of mite species can infest horses, with the most clinically significant being Chorioptes equi (chorioptic mange), Sarcoptes scabiei (sarcoptic mange), and Psoroptes equi (psoropic mange). Chorioptic mange, caused by C. equi, is the most common form in horses and preferentially colonizes the lower limbs, fetlocks, and pasterns, causing intense pruritus, scaling, and foot stamping. Sarcoptic and psoropic mange are notifiable diseases in many countries owing to their highly contagious nature. Diagnosis is by deep skin scraping and microscopy. Treatment typically involves repeated whole-body application of acaricidal washes or systemic ivermectin. Adequate bedding management and quarantine of new animals reduce transmission risk. For related anatomy see fetlock and the pastern and lower limb as the primary infestation zone; for general parasite context see mites in the broader class of equine parasites.