This veterinary resource provides the indications, methods of analysis, normal values and conversions, danger values, possible artifacts, effects of different drug therapies, causes of increase/decreased values and best course of action for each abnormal result. The text is organized by body system for quick reference and should help readers choose laboratory tests for the most efficient and cost-effective diagnosis, interpret the causes of lab abnormalities and address them. This third edition contains additional chapters on Therapeutic Drug Monitoring and Laboratory Diagnostic Toxicology, General Laboratory Concepts and Introduction to Serum Chemistries.