Rafael Castejon was born in Cordoba in 1893, and was inspired by his school teacher, E. Hernández Pacheco, to become a vet. He finished his studies in 1913, winning a special prize, and became a military vet specialising in the study of horses, a field he felt passionate about and to which he brought important innovations. He was keen on history and archaeology, as well as Arabic studies, and found time to study ethnology alongside his veterinary work, which concentrated mainly on infectious and parasitic diseases. He was President of the Provincial College of Veterinary Scientists of Cordoba, head of the Veterinary School, and played a part in setting up the Livestock Directory Board. He was also director of the Military Stud Farm in Moratalla, took part in many conferences and scientific congresses and meetings, and promoted magazines to popularise Veterinary Science, and other subjects. Rafael Castejon was a major figure in the study, consultation and direction of animal diseases in this country.
While he was still alive, the city of Cordoba erected a bust, in recognition of his excellent work, in the Veterinary Faculty gardens at the beginning of the 1985-86 course. Not long afterwards, in 1986, he died.