In Rat Terriers, a “pie bald” dog is basically a white dog with any Rat Terrier color of spotting, but when a dog has a large saddle-shape covering the back of the dog, it’s known as a “blanket-back” marking, one of nine acceptable markings in the breed.

Desert Rat” by Amanda Hall   
www.yowyow.com
http://www.facebook.com/Yowyowtails
http://fineartamerica.com/profiles/2-amanda-hall.html
Pinterest Amanda Hall @yowyows