Hi, I have a blind GSP. Her iris's did not develop and we have been starting to train her with voice. My Princess is only 9 weeks old so if you find out any useful info please share with me as I need all the help I can get. Clara is a cutie. I did find some info on the web and apparently there is a book on training blind dogs. Just google blind dogs and I am sure you will find the same info.
Good luck