Sufyan bin Sa‘id Ath-Thawri سفيان الثوري · The Book of Water

"I poured some water for him for Wudu', and a cat came and drank from it, so he tilted the vessel for it to drink." Kabshah said: "He saw me looking at him and said: 'Are you surprised, O daughter of my brother?' I said: 'Yes.' He said: 'The Messenger of Allah (ﷺ) said: 'They are not impure, rather they are among the males and females (animals) who go around among you."

"The Messenger of Allah (ﷺ) used to perform Ghusl with a Mudd and Ghusl with a Sa'."