I wouldn't have blinked if poodle and chihuahua were back in the lineage somewhere.  Terrier is definitely in the  forefront though, OBVIOUSLY.  A.  She's the spitting image of a terrier.  B.  She attempts to hunt rabbits, birds, crickets.  She "digs and buries" her bones and toys all over the house.  She's a total tomboy.  :-)  She's completely different in temperament from the chihuahuas and poodles that I grew up with.  But I'll give them poodle.  50% is a stretch...