Blue Merle border collie Stock Photo | Adobe Stock
Ghost" tan blue merle and white Border Collie with "erased" tricolor markings ("ghost" tan tricolor me… | Border collie blue merle, Blue merle, White border collie
Cooper, The Blue Merle Border Collie - Home | Facebook
Blue Merle Border Collie - Are They Healthy, Happy Pets?
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blue eyed blue merle border collie, isolated on white Stock Photo by Lifeonwhite