Thanks for the new topic, Mel. I want to add leonid's comment, from the other thread:
QUOTE
When Peter Wright staged Giselle in the 60's for the Royal Ballet Touring Company, he used Wolfhounds to dress the hunting scene for the entrance of the Prince of Courland and what a splendid sight these huge dogs made. David Bintley used Lurchers in his King Arthur ballet.
ADDED I think David Blair's production of "Giselle" had a dog(s) in it.
I have been trying to remember whether there is such a thing as a pas de chien. If there is, our Adult Beginner class hasn't gotten to it.

Two difference between cats and dogs come to mind that show the advantages that cat characters and cat-influenced steps have over dogs, as well as the difficulties that choreographers might face in working with dog-based movement.
(1) Dogs, when excited or after exerting themselves, tend to pant heavily and to allow their tongues to flap outside their mouths. I do not believe that this sort of behavior is encouraged among ballet dancers except in certain modern choreography.
(2) Dogs prior to jumping or running
reveal the preparation needed to carry out the movement. Cats tend to mask their preparation as much as possible, as do dancers.