In this book, the authors gather and present current research in the study of the behaviour, classification and diseases relating to the feline species. Topics discussed in this compilation include the use of Type 1 interferon for treating feline retrovirosis; new advances in the diagnosis, epizootiology and taxonomy of feline piroplasmids; feline hepatozoonosis and the resurrection of hepatozoon felis; the role of cats in toxoplasma gondii infection; and the therapeutic effect of melatonin in feline uveitis.