Actually there was an article written in the other thread about this from the trainer/owner's own mouth. So he is the dog that is used at first at the start of the HP third movie(when we see Padfoot in the bushes when Harry is catching the night bus in HP and POA).
# "Breed not a savage dog, nor permit a loose stairway." - Talmud
# "In my day, we didn't have dogs or cats. All I had was Silver Beauty, my beloved paper clip." - Jennifer Hart, Arlington