Deer don't have to look sick—and many do not initially—to be infected with the always-fatal Chronic Wasting Disease. This mule deer buck in Colorado is infected with CWD and doomed to die. It points to two worries; first, disease experts believe CWD is probably in many places where people don't think it is; and second, hunters could be eating CWD-infected animals without realizing it. Photo courtesy Dr. Mike Miller, CWD expert and senior veterinarian with the Colorado State University Diagnostic Lab in Fort Collins