This edition is an updated and expanded version of its first edition published in 2002, which has been the required textbook of many veterinary acupuncture training programs in USA, Canada, Europe, Australia and Asia. The main goal for this edition was to address our students’ and readers’ needs by making complicated TCVM concepts easier to understand. To do this, we reorganized and rewrote the material, and print the book in full color to make it more user-friendly. We added images, clinical cases and self-tests to help our readers learn better. 207 tables and 331 images and diagrams clarify the fundamental principles in TCVM. Clinical cases provide practice opportunities for readers to apply their knowledge to situations like those in practice. Self-test questions help the readers review the most important concepts in the chapters. Chapters 1. Yin and Yang 2. Five Element Theory 3. Jing, Qi, Shen, Blood and Body Fluid 4. Zang-Fu Physiology 5. Jing-Luo: the Meridians 6. Etiology and Pathology 7. Diagnostic Methods 8. Primary Diagnostic Systems: Eight Principles and Zang-fu Patterns 9. Diagnostic System for Channels and Lameness 10. Other Diagnostic Systems: Qi-Blood-Body Fluid, Six Channels, Four Stages, and San Jiao Patterns 11. Prevention and Treatment Strategies Appendix A: Chronicle of Chinese History and Traditional Chinese Veterinary Medicine Appendix B: TCVM Diagnosis Diagrams Appendix C: How to Say Common Chinese Names