watch 01:36 The Loop (TV) Do you like this video? Mary Moo Calf is a fictional comic book seen in a flashback in "Tales of Grotesquely Grim Bunny." It is one of the first comic books D.W. ever picked out. It appears to be the baby variation of Mary Moo Cow. Retrieved from "https://arthur.fandom.com/wiki/Mary_Moo_Calf?oldid=245841" Categories: Comics Objects A to Z Community content is available under CC-BY-SA unless otherwise noted.