The little-known sport of dwarf bullfighting has raised a red flag for America's little people.The sport, which has dwarf toreadors battling baby calves, is a popular attraction in Mexico and other countries where bullfighting is popular. There are as many as 20 different troupes, according to NBC Sports, but some little people such as Clinton Brown III fear dwarf bullfighting is blurring the line between entertainment and exploitation, especially because the bullish battles are carried out for laughs."These guys are really taking their life in their hands doing this," Brown told The Huffington Post.