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
Alliance for Animals Alliance for Animals The Alliance for Animals was established in 1988, by a small group of animal advocates dedicated to bringing humane education and affordable veterinary services to inner city Boston, United States. In addition to bringing services to the people, Alliance brought life-saving rescue to the animals of Boston. Since 1988, the Alliance for Animals has gone from a handful of volunteers working from their homes, to an organization staffed by veterinarians, technicians, administrative workers, and volunteers. Since 1988, the Alliance for Animals has spayed/neutered and provided other veterinary services for approximately 60,000 animals with the help of Alliance's