In May 2008, a federal judge ordered Tyson to stop using the label. Ionophores are used to control cocidiosis, a parasite common in all birds and the medication is not used in human medicine. In June 2008, USDA inspectors discovered that Tyson had also been using gentamicin, an antibiotic, in eggs. According to USDA Undersecretary for Food Safety Richard Raymond, Tyson hid the use of this antibiotic from federal inspectors, with Tyson not denying the claim and stating that the use of this chemical is standard industry practice. Tyson agreed to voluntarily remove its "raised without antibiotics" label in future packaging and advertising. As of March 31, 2019, their website states that "All chickens raised for the Tyson® retail brand are grown without using any antibiotics – ever." An Oxfam report issued in 2016 cited anonymous employees who stated they have been denied bathroom breaks so frequently that they have started wearing adult diapers to work. According to the report:  Workers struggle to cope with this denial of a basic human need. They urinate and defecate while standing on the line; they wear diapers to work; they restrict intake of liquids and fluids to dangerous degrees; they endure pain and discomfort while they worry about their health and job security. According to Celeste Monforton, professor of occupational health at George Washington University, on average, more than one Tyson Foods employee is injured and amputates a finger or limb per month. From December 2004 through February 2005, an undercover investigator for People for the Ethical Treatment of Animals (PETA) claimed to have worked on the slaughter line of a Tyson Foods chicken processing plant in Heflin, Alabama. Using a hidden camera, he allegedly documented the treatment of the more than 100,000 chickens killed every day in the plant. PETA alleges that workers were instructed to rip the heads off of birds who missed the throat-cutting machines. He claims he saw birds scalded alive in the feather removal tank, and he said that managers said it was acceptable to scald 40 birds alive per shift. The investigator claims plant employees were also seen throwing around dead birds just for fun. PETA has asked Tyson to implement controlled atmosphere killing (CAK). For this reason, PETA is boycotting businesses that use Tyson as a supplier, such as KFC and distribution channels such as Sunset Strips. The video, taken by the investigator of the killings, was posted on YouTube. In 2006, Tyson completed a study to determine whether CAK, which uses gas to render chickens unconscious before slaughter, could be a more humane practice than conventional electrical stunning.