Felidae carnivores, meaning they are dependent on nutrients in animal flesh for survival, and because of the large proportion of meat in their diet they are sometimes referred to as hypercarnivores. Of the 13 terrestrial families in the order Carnivora, they are the strictest carnivores. The Felidae comprises two subfamilies, the Pantherinae and the Felinae. The former includes the "Panthera" species tiger, lion, jaguar, leopard, snow leopard, and "Neofelis" species clouded leopard and Sunda clouded leopard. All the non-pantherine cats are part of the Felinae, which includes several genera and the majority of cat species. The first cats emerged during the
Animals (Scientific Procedures) Act 1986 inquiry compared the Act to legislation from France, the U.S., and Japan. The report concluded that "virtually all witnesses agreed that the UK has the tightest system of regulation in the world" and that it is "the only country to require an explicit cost/benefit assessment of every application to conduct animal research." Note that costs are explicitly in terms of adverse effects on animals, not the financial cost to the experimenters. In 2005, Patricia Hewitt, then British Secretary of State for Trade and Industry, called the Act "[among] the strongest laws in the world to protect animals which are being