I've been reading Stanley Coren's "Why Does My Dog Act That Way?", which is about dog personalities, and has a lot of interesting information on the history of dog domestication. Anyway, most of the book refers to predicting the personality of purebreds, but there is an interesting paragraph on mixed, or "random-bred" dogs. Essentially, he says that we lose the predictability by not knowing which genes came from which parent breed. However: "John Paul Scott and John L. Fuller carried out a series of selective breeding experiments at the Jackson Laboratories in Bar harbor, Maine. By a happy chance, their results revealed a simple rule that seems to work. Their general conclusion was that a mixed breed dog is most likely to act like the breed that it most looks like. Thus, if a Labrador retriever- German shepherd cross looks much like a Labrador retriever, it will probably act much like a Labrador retriever. If it looks more like a German shepherd, its behavior will be very German shepherd-like. On the other hand, as we discussed earlier, most mixed-breed dogs have some predispositions and behaviors that are characteristic of both breeds that contributed to it. The more of a blend that the dog's physical appearance seems to be, the more likely that the dog's behavior will be a blend of the two parent breeds. Thus, if you want an estimate of a mixed-breed dog's personality, first decide which pure breed it looks most like and then use that as your prediction. It won't be 100 percent accurate, but it should be close." For Brody, the most "Border Collie" thing about him is his coat. His body shape, to me at least, seems to be more "retriever-ish", or maybe hound or setter of some sort. I did the personality profile in the book, which asks questions about five different traits: dominance/territoriality, intelligence/learning ability, emotional reactivity, sociability, and energy. He scored moderately low on all except dominance/territoriality, which was moderately high. For the typical Border Collie, these would all be very high EXCEPT dominance/territoriality, which would be moderately low. ( I was quite surprised by the results, as I would have guessed he would have scored higher on the reactivity and intelligence. Maybe I'll retake the test.) For those of you with mixed-breed dogs, do you find the conclusion of the study to be true for your dog?