Bonheur was trained by her father, Raymond Bonheur, an art teacher. She soon showed a talent for sketching live animals, and she began studying their movements and forms on farms and in the city's stockyards, gaining a superior knowledge of animal anatomy. Finding that women's clothing restricted her movement during these outings, Bonheur began wearing trousers, a practice she continued for the rest of her life. She was a regular Salon exhibitor from 1841 to 1855. The Horse Fair (1853), considered by many to be her masterpiece, was acquired in 1887 by Cornelius Vanderbilt for a record sum and became one of her most widely reproduced works. Bonheur was unconventional for her time. In addition to wearing trousers, she smoked cigarettes and for a time kept a lioness. In 1865 she became the first woman to receive the Grand Cross of the Legion of Honour.