Veterinary Medicine was completely dominated by men for many years until the late 1930's and 1940's when women tried to apply. The degree covered only two years up until that time and only large animals were studied. It was soon obvious that there were more dog and cat patients than large animals, and the schools had to expand from a two year course to a four year course including small animal pets. There were only ten veterinary schools in the U.S. at that time, and the few women who applied were usually turned down. Now, at least 75% of the students are female, and they specialize in both large and small animal practices.