The first explanation is the fact that in some unspecified time in the future, an outcross occurred, involving a Labrador as well as a breed of Pet dog that carries the dilute gene. A Weimaraner by way of example. A further problem current in Silver Labs is named silver lab https://hectorfrdmw.blogdal.com/39362551/5-tips-about-buy-labrador-retrievers-you-can-use-today