Answer
Childhood is when blind children should be learning orientation and mobility skills with a cane. A blind person must first have a good foundation in orientation and mobility in order to work effectively with a guide dog. Guide dogs aren't Lassie. A guide dog provides information to its handler about the environment, but ultimately the handler must make the decisions about where to go. You should be working with your school system to make sure that your child is getting the proper skills training. If your school is refusing, I suggest contacting your local chapter of the National Organization of Parents of Blind Children http://www.gopbc.org/ They'll help you fight for what your child needs and get you in contact with people who can serve as mentors and role models for your child. When your child is older, he or she may wish to apply to Southeastern Guide Dogs (the program closest to you) http://www.guidedogs.org/