Bulldog ferret refers to a body type or build of a ferret.  I don't
hear the terms used very much online anymore.  I do still hear them
occasionally in person however.  The terms I've heard are:
 
whippet -- very wirely, sleek builds, and narrow faces
standard -- just what it says
bulldog -- very stocky, shorter legs, tail, broad face, heavier
 
I know long ago some breeders actually tried to breed for these different
body types as different people liked different types of ferrets.  I still
refer to these terms when describing a ferret to someone so they can well
imagine its look aside from markings and coloration.
 
Wolfy
 
Please visit:
http://www.geocities.com/wolfysluv/
for information on ferret deafness:
http://www.geocities.com/wolfysluv/deaf.html
[Posted in FML issue 3648]