Veterinary ethics is a system of moral principles that apply values and judgments to the practice of veterinary medicine. As a scholarly discipline, veterinary ethics encompasses its practical application in clinical settings as well as work on its history, philosophy, theology, and sociology. Veterinary ethics combines veterinary professional ethics and the subject of animal ethics. The subject of veterinary ethics can be interpreted as an extension of critical thinking skills necessary to make the decisions in veterinary care in order to support the profession's responsibilities to animal kind and mankind. Five main topics construct the physical usage of Veterinary Ethics. The first is history which describes how these ethics came to be, and how they have changed in the modernization of the veterinary industry. The second is the relation veterinary ethics has with human medical ethics, which together share many values. Third, the principles of these ethics which are updated regularly by the AVMA. Fourth are the key topics of veterinary ethics, which describe what these ethics cover. Last, how these ethics are incorporated into everyday practice and also how they affect those employed in the industry.