dog behavior traits

Allowing their behaviors are associated with specific breeds of dogs, which would be the Chihuahuas?

a defining feature that would give an alien from outer space to find one? (Behavior, not physical identification.) So, what is the description of a physical?

"Fickle". because of what I've seen, read, and heard, that can really be. if not widely * socialized, they can be very particular about their likes and dislikes (children, other dogs, strangers, etc, etc.). as to physics, just say "small" because, well, that's what they are.

Webinar: The Long and Short of It: Finding Genes for Complex Traits In the Domestic Dog