Gallifreyan cat

Gallifreyan cats were cats from the planet Gallifrey. (PROSE: Human Nature) According to the Doctor, they were popular pets on Gallifrey. (AUDIO: Nevermore) They had thirteen lives, and slept through all of them. (PROSE: Doctor Who and the Krikkitmen)

They were likely not native to the Time Lord homeworld. The Fifth Doctor once told Tegan that his first incarnation and a Time Lord contemporary known as Ruath "introduced cats into Gallifrey's ecosystem", but he did not indicate where the cats had originated. (PROSE: Goth Opera) At some later date, one of the Presidents of Gallifrey had a pet cat. It was eaten by a mouse that had been enlarged by the Rani in an experiment. (TV: The Mark of the Rani)

Native to Gallifrey were the Killer Cats of Gin-Seng. (AUDIO: Erasure, PROSE: The Return of the King)

Behind the scenes

 * Gallifreyan cats were further mentioned by a partially-in-character Jodie Whittaker in an online Q&A organised by the magazine WIRED in 2020, where, asked how many lives Gallifreyan cats would have (considering that Earth cats supposedly have nine while Earth people have just one, but Gallifreyan people have thirteen already). Whittaker claimed that Gallifreyan cats had infinite lives.