Billi (August 2, 2008 - June 20, 2024[1][2]) was a female domestic shorthair cat who displayed behaviors that may have been human-animal communication.
[3][4] Billi was the subject of scientific study TheyCanTalk by researchers at the University of California, San Diego, and was monitored by cameras placed in the living room of her owner Kendra Barker.
Barker used programmable buttons that Billi could press in succession to form "sentences", and use words such as "mad", "ouch", and "later".
In the social media videos, Billi can repeatedly be seen pressing the buttons "catnip" "water" when Kendra was drinking her morning coffee.
Whenever these buttons were pressed, they played the words they were programmed to, similar to the Fitzgerald Key, a method used to teach deaf children sentence structure.