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The distinctive, free-roaming feral cats of the Kenya coastal area – found from city streets to the Arabuko Sokoke forest – were "discovered", in the Western cat fancy sense, by horse breeder and wildlife artist Jeni Slater in 1978.
In 2012, conservationists reported discovering previously unknown populations of Scottish wildcats living in the Cairngorms National Park, but still threatened because of crossbreeding with domestic and feral cats.
Feral cats on the other hand are generally agreed to be the descendants of domesticated cats that have themselves never been domesticated.
In 1995, 100 people became ill when water from the Humpback reservoir, which was still in service, became contaminated with the parasite Toxoplasma gondii, which causes toxoplasmosis, from the feces of feral cats.
The authors also argue that feral cats act as vectors for diseases that can impact domestic cats, wildlife and humans, examples include feline leukemia virus, feline immunodeficiency virus, fleas and ear mites (which are also carried by canines and wildlife), hookworms, roundworms, Bartonella, Rickettsia, Coxiella and Toxoplasma gondii, and that fecal matter has also been shown to degrade water quality.