Gender Medicine in Europe. Females Are Mosaics: X Inactivation and Sex Differences in Disease. The word mosaic is a form of work of art in which pictures are produced joining together minutes pieces of glass, stones and other materials of different colors.
Most GSDs will live to be between 10-13 years of age while 11-12 years is generally considered the average lifespan. A German Shepherd Dog becomes middle-aged between 6 to 7 years of age, and a GSD is generally considered geriatric at around 10. More senior GSD info.
Dogs in the age range of 6 to 18 months are ready for adult dog food. They need a lot of energy at this age, so a quality food with a good amount of calories is the best choice. My friend, Jorge, feeds his 10-month-old German Shepherd a premium-brand kibble for adult dogs.