When Dr. Gustavo Aguirre set out to find a cure for night blindness in dogs, a disease related to Progressive Retinal Atrophy, he knew it was going to require a lot of patience. When he started studying this disease, there was no map for the canine genome. He was able to find the mutated gene that caused the disease, and, by saving his genetic samples, he made a significant contribution to the mapping of the canine genome, which was completed in 2004.