Felidae Oligocene, about 25 million years ago, with the appearance of "Proailurus" and "Pseudaelurus". The latter species complex was ancestral to two main lines of felids, the cats in the extant subfamilies and a third major group of extinct cats, which are assigned to the subfamily Machairodontinae. The machairodonts included the saber-toothed cats such as the "Smilodon". The "false sabre toothed cats", the Barbourofelidae and Nimravidae, are not true cats, but are closely related and together with Felidae and other cat-like carnivores (hyaenas, viverrids and mongooses) make up the feliform carnivores. Results of mitochondrial analysis indicates that all the Felidae descended
Royal Society for the Prevention of Cruelty to Animals animals in hauling carriages, scientific experiments (including vivisection), and cultural amusements of fox-hunting, bull-baiting and cock-fighting were among some of the matters that were debated by social reformers, clergy, and parliamentarians. At the beginning of the nineteenth century there was an unsuccessful attempt by William Johnstone Pulteney on 18 April 1800 to pass legislation through England's Parliament to ban the practice of bull-baiting. In 1809 Lord Erskine (1750–1823) introduced an anti-cruelty bill which was passed in the House of Lords but was defeated in a vote in the House of Commons. Erskine in his parliamentary speech combined the vocabulary of