Aug 31, 2007 2:26 PM PULLMAN, Wash. (Map, News) - Advances in veterinary medicine and affluent pet owners willing to pay for lifesaving treatments have created an ongoing shortage of animal blood for use in surgeries and transfusions. But 14 regular canine contributors are helping to fill the demand at the Washington State University Veterinary Teaching Hospital here. Jacob and his brother, Quinn, both 4-year-old greyhounds, were the latest donors in a WSU program that has spent two decades trying to solve a problem that few people know exists. "All the major banks are back-ordered," said Jane Wardrop, 55, a...