Montana,
I think the shades and ball cap story is as relevant as scents such as
perfume or hair coloring. The whole problem is the dog is new in the
household, with an unknown background. I think any theory is relevant
since they do not know what is causing the problem. Of course I have no
professional knowledge. I just know that in the event that I wear
something new, dare to leave the house and get a strange smell on
me....My dogs just about snort my skin off (not in an aggressive way)
In the event that I have company I put them up for several reasons, but
the few people that they do visit with would get sniffed to death if I
didn't call em off...I hope a trainer can help resolve this dog's
problem whatever it is.

Be Free,
Judy