It seemed well researched, although one never knows, and exaggerations are
always a possibility.  Also the situation may vary in different parts of the
country.  I had also been under the impression that most "lab dogs" were
specially-raised Beagles, but that other dogs were also used.  The author
describes visting a sale held at a sale barn in southeastern Missouri, where
various sellers brought a number of dogs -- about 100 -- which were sold to a
"registered dog dealer, licensed by the U.S.D.A."  While the dealers are
required by regulations to buy dogs only from sellers who raised the animals
themselves, the article goes on to relate how these rules are flouted.

Linda R.
Pacifica, CA