This document provides a timeline history of veterinary medicine from 3000 BC to the present. Some key events include: - 3000 BC - The earliest known veterinarian, Urlugaledinna, lived in Mesopotamia and was an expert in healing animals. - 2500 BC - Veterinary treatises on horses and cattle existed in China. - 2300 BC - The Eshuna Code in Babylonia identified rabies control measures. - Present - In 2022, the first successful transplant of a genetically modified pig heart into a human with heart disease was performed.