The book by E. L. Yerusalimsky “Dog Exterior and Its Assessment,” with its chapters of varying degrees of complexity, is a fundamental guide for everyone who wants to specialize in this area: from amateurs to professionals. The basics of general conformation are presented from a traditional point of view, as well as from the standpoint of biomechanics and the “golden ratio”. The author's introduction of kinometric canons and traits makes it possible to objectify the assessment of the exterior and, in addition, makes the book useful for breeders, giving them a practical tool for targeted selection.