First, I must say that I don't use a guide dog, so am not an
expert.  However, I have met at least two people who have trained
their own dogs.  Third, I have taught cane travel, so know a
blind person can do it.   And fourth, while a blind person could
not train a guide dog/human team in the same way that a sighted
person would, He/she could still probably do it.
I am not aware of any official position on the part of the NFB
towards a blind person doing this, and would be surprised at
such.  There may well be individuals that take this position, but
that is their choice.
 
David Andrews
... Sorry, the dog ate my Blue Wave packet.
--- Blue Wave/386 v2.30 [NR]
---------------