Sorry for starting a new thread. I didn't think I had anything to add
and lost where this would fit in.
I didn't know what a dog's nub was and therefore missed the joke about
gluing the label to it. Today, I googled to find out and found this
about telling the difference between a naturally short tailed dog and
one that's had its tail docked.
http://www.donabney.com/issue_bobtail.shtml
The difference between the Natural bob-tailed dogs and those that have
had their tails removed can be determined by x-ray or feel. The boney
part of a naturally bob-tailed dog can be felt and will taper toward the
end. The tail of a dog that has had his tail bobbed will be blunt on the
end. It's just a matter of feeling the boney structure to determine if
the dog is a Natural Bob-Tail or if the tail has been removed.
--Lia