Bat Cow - Batman: Wayne Family Adventures

Saved from a Leviathan owned slaughterhouse while on a mission, Damian Wayne agreed to help care for the dairy cow, providing her with a safe and loving home at Wayne Manor. Named Bat Cow, because of the cowl-shaped markings on her face, she was Gotham’s premier (and only) crime-fighting bovine. It was after her rescue mission that prompted Damian to go vegetarian.

She found friendship in Alfred Pennyworth. She also got on well with Damian's fellow pets Ace, Alfred, Titus, and Goliath. 

One afternoon, after escaping from the shed, Bat Cow and Alfred strolled around the grounds and the house. Managing to avoid detection, she returned before anyone discovered she was missing. 

Diana Prince, aka Wonder Woman, found her to be perfection while she was in Gotham visiting Bruce at Wayne Manor.