I have two dogs -- both Border Collies.
I used to have a Papillon as well, but he didn't get along with the Border Collie in my photos (which with a seven-fold difference in body size can be fatal), and so now he lives with an agility competitor in Modesto and her other Papillon, yapping and swimming and playing with someone his own size.
My first Border Collie, who is my most frequent model, is a behavior case and the reason I ended up working on this project in the first place!
I do plan on adding another Border Collie in the next few years. Just waiting for the right time, the right breeding, and the right puppy.