De canibus Britannicis liber unus. De rariorum animalium et stirpium historia, liber unus. De libris propriis, liber unus.

Caius, a pioneer naturalist as well as a physician, corresponded with Conrad Gessner, with whom he had made friends while returning from Padua. Caius wrote this study of British dogs to send to Gessner as a contribution (not used) to Gessner's Historiae animalium, and also sent Gessner drawings of dogs, which were printed in later editions of Gessner's work. Translated into English as Of Englishe dogges, the diversities, the names, the natures and the properties. A short treatise written in Latine and newly drawne into Englishe by Abraham Fleming (London: Rychard Johnes, 1576). Digital facsimile of an 1880 edition of Fleming's translation from the Internet Archive at this link.