The Encyclopedia of Veterinary Medicine, which aims to be an encyclopedia between the hands of veterinarians and those interested in the field of animal wealth and lovers of animal husbandry. All the observations that we received from all users of this application were taken into consideration from its professors at the College of Veterinary Medicine and Animal Resources at King Faisal University and a large number of veterinarians from within the Kingdom Saudi Arabia and some Arab countries such as Egypt, Algeria, Tunisia, Kuwait and the Sultanate of Oman in addition to amending some practical mistakes this update