Resumen En este articulo se describe el caso clinico de una perra de raza Poodle de nueve anos de edad, castrada. Se llevo a consulta por vomito cronico desde hace tres anos y diarreas ocasionales sanguinolentas, con presencia intermitente de moco. Habia sido tratada en varios centros veterinarios sin mejoria alguna. Se le realizo endoscopia y rectoscopia con un diagnostico de gastritis cronica antral difusa activa con organismos compatibles con Helicobacter felis a nivel de estomago y colon. Palabras claves: canino, colon, endoscopia, estomago, gastritis, rectoscopia. Summary This article describes a case of a nine year old female spayed Poodle, that was presented to the clinic because of a three year chronic vomiting and occasional intermittent bloody diarrhea with mucus. It had been treated in several veterinary clinics without improvement. It underwent endoscopy and rectoscopy with a diagnose of active diffuse antral chronic gastritis and Helicobacter felis Like Organisms and in colon Helicobacter felis Like Organisms. Key words: canine, colon, endoscopy, gastritis, rectoscopy, stomach.