Bat-Cow is a bovine member of the Batman Family. The original was a part of Johnny DC's Tiny Titans. She stole Batman's cape and cowl and became a vigilante. She is a member of the League of Just Us Cows.
Bat-Cow was later adapted into the DC Universe and given a new origin. She was rescued from the slaughterhouse during one of Batman's raids on Leviathan and was taken in as a pet by Robin. The experience also made Robin a vegetarian.
Bat-Cow was created by Art Baltazar and Franco Aureliani, first appearing in Tiny Titans #17. (2009) The revamped Bat-Cow was created by Grant Morrison and Chris Burnham, first appearing in Batman Incorporated (Volume 2) #1. (2012)