Bian Zheng is a system of Pattern Differentiation unique to TCVM used to make a TCVM diagnosis. Bian Zheng is not equivalent to a Western Biomedical diagnosis. A canine clinical case of inflammatory bowel disease is used as an example of differentiating between Bian Zheng and Western Biomedical diagnosis. Treating a disease which was non-responsive to conventional Western therapy on the basis of Bian Zheng led to a complete resolution of clinical signs and a positive outcome. The approach to making the correct Bian Zheng is discussed.