My husband and I just got a GSD. He's almost three months old and he's precious. But my husband and I are considering the idea of training him to be a working dog. But I was wondering what is the right age to start that sort of training. We also haven't narrowed down which field we want them in, whether it be search/rescue, police dog type training, or something else. We obviously don't want to start training until we make up our mind, but I was wondering at what age is it appropriate to start working dog training? Thanks in advance for the help.