This document is a logical, systematic and organized collection of the procedures that are carried out at the Veterinary Small Animal Clinic Doctor Santiago Reyes Amaya on the management of parasitic and viral gastroenteritis in canines less than one year old. This manual describes information related to the entrance and reception of the client with your pet, evaluation of TRIAGE, admission to the medical consultation, anamnesis, clinical examination to be carried out, and complementary tests to take into account, pharmacological therapies and areas of hospitalization, among others. It is intended with this document to streamline the work, clarify the doubts that the medical staff finds, improving the care and management of each patient.