United State Border Handlers Collie Association
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Cow Dog CentralWestern Cattle Dog Association
NCANational Cattledog Associationhttp://www.nationalcattledog.com/NCA/NCAHome.htm
a link to findings on why Border Collies herd the way they do.
http://www.huffingtonpost.com/2014/08/27/sheepdogs-herding-human-crowd-control-video_n_5722668.html
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