Patrick Murray

Can a majority of the traditional tan and black working GSD's be traced back to a likely select group of working breeding studs and bitches?

How about pure black or black and tan and others? I am most interested in the black and tan as that is the color pattern of my dog, Jake. I am curious as to how black and tan lines emerged, from which dogs and why.

Thanks in advance for any helpful feedback.

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Patrick Murray
Amateur Working Dog Enthusiast