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Blue German Shepherds German Shepherds are known for their intelligence and training ability. They need a daily routine of exercises and mental stimulation in order to stay healthy and happy. Blue shepherds are a unique breed of German Shepherds with an extra dose of the dilution gene, making their black fur appear blue. This genetic variation is naturally occurring. Health Blue German Shepherds are healthy dogs, but they are prone to certain health issues like elbow and hip dysplasia.