The first popular analysis of the problem, which thoroughly examines the ethical and legal standards for the use of stimulants in dog breeding, methods for correcting the exterior, working qualities and productivity of animals, the possibilities of control and the consequences of doping. Special chapters comment in detail on the modern possibilities of pharmacology and physiology for the correction of higher nervous activity, skeletal structure, muscle development, and fertility of dogs. The dangers that unscrupulous rivals can expose an animal’s health and ways to protect against them are considered. The chapter devoted to ontogenesis, the sensitivity of the body to various influences, allows us to highlight moments in the life of an animal that are characterized by special plasticity and vulnerability to influences that improve or worsen the quality of the dog. An analysis of methods for correcting the exterior and working qualities with the help of specialized feeding is given. The information provided on the breed specific pharmacosensitivity of dogs allows us to specify the recommendations. The main emphasis is on an individualized pharmacophysiological approach based on an understanding of natural technologies. The book is written in accessible language with a large number of practical examples. Despite the purely scientific approach to the problem, the presentation is practically free of special terminology. The text is accompanied by a subject index, facilitating the practical use of the data provided. The book is addressed to dog handlers and dog breeders (both ordinary amateurs and professionals), livestock breeders, biologists, pharmacologists, doctors and everyone interested in the problems of animal improvement.