Animal lovers wearing masks resembling animals perform during a demonstration to mourn the death of animals killed and buried due to foot-and-mouth disease and bird flu, in Seoul Jan 19, 2011. South Korea said on Tuesday it had culled about 15 percent of its combined pig and cattle population to contain outbreaks of foot-and-mouth disease, while it slaughtered three percent of its poultry population to prevent the spread of bird flu. The Korean characters on the signs read, "Cattle and pig are also lives!" (L) and "We can't breathe!" (R). [Photo/CFP]