These dogs have, through generations of mutations, adapted to the Zone. This led to the enhancement of smell and hearing, but a complete loss of sight. Relying more on their senses, blind dogs instinctively avoid anomalies and radiation. Knowing stalkers use this to their advantage. If you see a pack of dogs running one direction, but then suddenly stopping and going a different way, this means that somewhere there is an anomaly or an area of radiation. 0.