A butcher unloads beef from a truck outside a butcher's shop in Sao Paulo, Brazil July 27, 2017. REUTERS/Paulo Whitaker 

A butcher unloads beef from a truck outside a butcher's shop in Sao Paulo, Brazil July 27, 2017. REUTERS/Paulo Whitaker 

A butcher unloads beef from a truck outside a butcher's shop in Sao Paulo, Brazil July 27, 2017. REUTERS/Paulo Whitaker 

A butcher unloads beef from a truck outside a butcher's shop in Sao Paulo, Brazil July 27, 2017. REUTERS/Paulo Whitaker 

Men walk past a Polish butcher's shop in Boston, Britain June 27, 2016. Picture taken June 27, 2016. REUTERS/Oliver Ellrodt 

A butcher arranges pieces of sausage at his shop in Marseille, France, October 27, 2015. Eating processed meats like hot dogs, sausages and bacon can cause colorectal cancer in humans, and red meat is also a likely cause of the disease, World Health Organization (WHO) experts said. The review by WHO's International Agency for Research on Cancer (IARC), released on Monday, said additionally that there was some link between the consumption of red meat and pancreatic cancer and prostate cancer. REUTERS/Jean-Paul Pelissier 

A butcher arranges pieces of meat at his shop in Marseille, France, October 27, 2015. Eating processed meats like hot dogs, sausages and bacon can cause colorectal cancer in humans, and red meat is also a likely cause of the disease, World Health Organization (WHO) experts said. The review by WHO's International Agency for Research on Cancer (IARC), released on Monday, said additionally that there was some link between the consumption of red meat and pancreatic cancer and prostate cancer. REUTERS/Jean-Paul Pelissier 

A butcher arranges pieces of sausage at his shop in Marseille, France, October 27, 2015. Eating processed meats like hot dogs, sausages and bacon can cause colorectal cancer in humans, and red meat is also a likely cause of the disease, World Health Organization (WHO) experts said. The review by WHO's International Agency for Research on Cancer (IARC), released on Monday, said additionally that there was some link between the consumption of red meat and pancreatic cancer and prostate cancer. REUTERS/Jean-Paul Pelissier 

A butcher arranges pieces of sausage at his shop in Marseille, France, October 27, 2015. Eating processed meats like hot dogs, sausages and bacon can cause colorectal cancer in humans, and red meat is also a likely cause of the disease, World Health Organization (WHO) experts said. The review by WHO's International Agency for Research on Cancer (IARC), released on Monday, said additionally that there was some link between the consumption of red meat and pancreatic cancer and prostate cancer. REUTERS/Jean-Paul Pelissier 

A butcher arranges pieces of meat at his shop in Marseille, France, October 27, 2015. Eating processed meats like hot dogs, sausages and bacon can cause colorectal cancer in humans, and red meat is also a likely cause of the disease, World Health Organization (WHO) experts said. The review by WHO's International Agency for Research on Cancer (IARC), released on Monday, said additionally that there was some link between the consumption of red meat and pancreatic cancer and prostate cancer. REUTERS/Jean-Paul Pelissier 

A butcher arranges pieces of meat at his shop in Marseille, France, October 27, 2015. Eating processed meats like hot dogs, sausages and bacon can cause colorectal cancer in humans, and red meat is also a likely cause of the disease, World Health Organization (WHO) experts said. The review by WHO's International Agency for Research on Cancer (IARC), released on Monday, said additionally that there was some link between the consumption of red meat and pancreatic cancer and prostate cancer. REUTERS/Jean-Paul Pelissier 

A boy works with butchers slaughtering sheep and cows in a cattle farm during Eid al-Adha in Cairo, November 27, 2009. Muslims around the world celebrate Eid al-Adha to mark the end of the haj by slaughtering sheep, goats, cows and camels to commemorate Prophet Abraham's willingness to sacrifice his son Ismail on God's command. REUTERS/Asmaa Waguih (EGYPT RELIGION) 

A mother and her son look at packed beef at Hanamasa butcher shop in Tokyo January 27, 2004. U.S. beef imports was banned folowing the discovery of a mad-cow-infected holstein in Washington state last month. Japan is the biggest buyer of U.S. beef, importing about $1 billion worth annualy. Picture taken January 27, 2004. TO MATCH FEATURE STORY JAPAN-BEEF REUTERS/Haruyoshi Yamaguchi TA 

A butcher displays carries packed beef at Hanamasa butcher shop in Tokyo January 27, 2004. U.S. beef imports was banned folowing the discovery of a mad-cow-infected holstein in Washington state last month. Japan is the biggest buyer of U.S. beef, importing about $1 billion worth annualy. Picture taken January 27, 2004. TO MATCH FEATURE STORY JAPAN-BEEF REUTERS/Haruyoshi Yamaguchi TA 

A shopper exits a butcher shop in Chicago's meat and produce district, December 24, 2003. The market for U.S. beef exports effectively shut down on Wednesday as fallout from the first case of mad cow disease in the United States widened and public health investigators combed a tiny Washington state hamlet to find the cause of the potentially fatal disease. Japan, Mexico and South Korea, the top three markets for U.S. beef exports, banned imports after it was disclosed that a single 4-year-old Holstein cow tested positive for the brain-wasting disease, a discovery that threatened the $27 billion U.S. cattle industry. REUTERS/Frank Polich FJP/HB 

A butcher's assistant lays out the shop's wares at the start of morning trading in Namdaemun, a central Seoul street market. Pigs' heads are a South Korean food delicacy and are also used in traditional rites when businesses open new premises. Picture taken 27MAY94