Bat-Cow was originally a cow that was found by Damian Wayne during an investigation on a slaughterhouse, which the cow was sent to. Damian wanted to keep the cow and named it Bat-Cow which Batman had no objection to letting him keep the animal. During a later investigation, Batman discovered it had mind-controlling radiation inside of it, leading him to attempt to get rid of the cow. Damian, however would not allow him to hurt the cow.
After the events of Robin's death, Bat-Cow and Damian's dog felt a great loss in morale. Alfred Pennyworth and Nightwing had to take care of the cow. Later after Nightwing's disappearance, Alfred was the only caretaker of Bat-Cow.
Bat-Cow, complete with cape, spent time on a Wayne Enterprises-owned dairy farm. It was there the cow encountered the cosmic-powered "Forever People." One of them seemed to gain guidance from Bat-Cow's actions, namely when Bat-Cow gave one of the Forever People a scarecrow's hat.
Teen Titans Go!
Bat-Cow first appeared in the Teen Titans Go! universe in issue #45 of the comic line. When Superman got turned accidentally into a baby, he was sent from the Justice League to the Titans to babysit. When Superman got hungry, Bat-Cow was used to produce milk for him to drink but she got exhausted due to Superman's heavy intake of milk.
- When Bat-Cow first appeared in the DC Comics franchise, she was a brown and white cow, but in Teen Titans Go!, however, she's a black and white one.