Frank, back in the early 1980's I worked in the high desert, east slope of the Andes in Argentina (south of Malargue). I may have mentioned this to you previously, if not I should have.

Anyway, a herder who lived near where we were encamped had large dogs with a conformation like yours on your webpage. They were hip tall on me -- say about 3 ft or so. The herder used them to manage his goats I guess, but also to hunt rheas -- a large land bird that runs extremely fast (we chased a flock cross-country in a Toyota 4x4 pickup at probably 30 or 40 mph -- hard to tell when your head is banging on the roof). I understand that the dogs hunted in a small pack - 4-5 animals. Though I never got to see them hunt, I did eat the rhea!

At the time I thought they were a cross between an afghan and a greyhound. Think it was your boys?

B