HI zigaboo,
Demodicosis mange( or red mange) is a skin disease caused by a mite. This is not contagious to other dogs and some dogs are more prone to this then others and it is thought to be genetic. Because of this it may be a sites on this for further review. The sites will tell you the different types of red mange, local or generalized, and the treatments.
http://www.marvistavet.com/html/body_demodectic_mange.html
http://www.petplace.com/dogs/demodicosis-red-mange-in-dogs/page1.aspx
dog training consultant
24 years training & behavior,pet first aide, Therapy dog eval., PA Animal Response Team