If they do, it could be because they want to feel more like part of the family, or it's just a particular animal's personality and that animal was matched with the person meant for it.
Yes, I'm glad to hear differing opinions! We're keeping our options open but leaning toward a purebred waterdog of some sort. I'm sure I'll be back later with questions about how to integrate a new puppy in to a home life ruled by a cat (and with an African basenji in the mix)... :)
I saw this show for the first time last night. I didn't think it was sad, because the nice doggy gets adopted into a home where the people have been evaluated and dog is placed with people who are best suited for the individual dog. It's like a reality game and they all know only one home gets the dog. The people know they might not get that dog. But I'm glad that the people who don't win on the show, will probably adopt and rescue another well deserving dog. Just my take . . . but I only saw the one show.