I have absolutely no idea, but I've heard that twice. And neither time it was related to his tendency to get into dog fights with dogs that get in his face. But I'm also on a Border Collie message board, and I know of at least one other person there who was asked the same question about their purebred border collie. In action, he's obviously all Border Collie...all stalking and a very strong "eye." I just wish I had the money to do all the herding lessons I'd like with him, because he's really quite good. I'm the idiot out there in the field with no clue.