Temperament - The dog must present a generally gay, lively and active appearance.

Amplification
The Smooth should never take the lead in aggressive action toward humans. On the other hand, he should never retreat when challenged by canine competitors. It is for this reason that the Terrier judge must exercise caution when they feel the need to "spar" exhibits. A safe and reasonable distance must be maintained at all times. Likewise, do not let the more experienced dog, or handler, take advantage of the younger, more inexperienced.