The McNab Dog – commonly called McNab Shepherd or McNab Collie – is a herding dog that originated in the Mendocino region of Northern California. Samples collected from McNabs across the United States were evaluated for their genetic signature and found to support the creation of a unique breed signature for the McNab. Additionally, the tested dogs were also evaluated for certain physical traits and over 100 disease-causing mutations to help establish a baseline for these in the McNab population.