Research carried out by Professor Donald Broom at the Centre for Animal Welfare and Anthrozoology at the University of Cambridge has had a significant impact on the policy and practice surrounding farm animal welfare in the UK and beyond. Work on sow housing, calf housing, laying-hen housing, farm animal transport and other scientific work on animal welfare has led to legislation, binding codes of practice and changes in animal production and management methods in the United Kingdom and other European Union countries and many other countries around the world. In the EU, each year this affects 16 million sows, 6.5 million calves, 320 million hens and 6 billion animals that are being transported.