Are Certain Dogs Prone to Mange?
Puppies and dogs less than 18 months old are especially prone to developing localizeddemodectic mange, which often clears up on its own.
Generalized demodectic mange, the more serious, pervasive kind, can be hereditary in dogs. Old English sheepdogs and shar peis are prone to a severe form of demodectic mange affecting the feet. Older dogs who have an underlying illness may also be more prone.