Here's an update since the 9th of July.

Cash is a regular fixture now with his cart in the morning to 7-eleven about
3 days a week. He has a corner he parks in while you look about then comes
on call to let you put a few things in his little cart.

Biking with me is now just weekends as the pavement and everything else is
too hot at this season in the afternoon when I get home from work. He jogs
with Charlotte M-W-F and walks with Don T-TH. Walking with Don is where the
main behavior changes are coming to the fore. Cash has now dropped back
with Don to where he can see his feet clearly and using the 2 back rings on
a gentle tension, 'steers' Don gently about any irregular ground. Don isn't
blind but his depth perception isn't very good and his vision is a bit
fuzzy. (Yes, Don is under medical care, they just can't fix this one. They
don't think he will go blind as the years go on, but what's lost isn't going
to come back either).

The new harness Cash has has 2 rings on the side and came with the
attachment for a guide dog. Assistance trainer was here this morning and
reviewed with Don. Cash is now ready to use that but only with Don.
Apparently it will confuse Cash if either of us use it. The trainers
assessment is that at our need level, this is more Cash once he gets used to
it, training Don to his gentle pulls (grin).

Cash developed an interesting behavior with Don. Earlier he would pull (but
only with Don after we worked with him). Now, if he wants to 'wander' with
Don he won't really pull, he gives an almost puppy 'yip' then *gently* pulls
just a little bit where he wants to go. You know, checking his pee-mail on
the fire hydrant and stuff like that (grin).