Stationary Night Blindness
One of the only known dogs to have a condition known as stationary night blindness, the Briard dog of Sweden is now in the cutting edge of DNA testing to determine a specific test to clearly identify carriers, affected dogs and non-affected dogs.
Stationary night blindness is characterized by various degrees of blindness in the Briard dogs that may become progressively more pronounced as the dog matures or may remain relatively constant. This variation can go from slight loss of vision in shadows or dark areas to almost complete blindness even in full light. Since the dog's will have temperament changes when they start to loose their vision this is often the first indication that there is something wrong with the dog. [...]