This book is specifically tailored for a future career as an animal healer. All topics have been selected based on their importance for the safe recognition and diagnosis of diseases. In the spirit of a holistic diagnosis, peripheral areas such as the sense of time or the magnetic sense are also addressed. The essential points are summarized at the end of each chapter. The aim is to provide students with a foundational knowledge in a simple and understandable manner, enabling them to work seriously and competently. About the author, Ms. Petra Sauer (born 1961): She is a state-certified pharmaceutical representative and holds a degree in business administration (FH). She has been involved with animal healing since childhood and has worked for many years in a natural health pharmaceutical company.