Dzo Dzo A dzo (Tibetan མཛོ་ mdzo) (also spelled zo, zho and dzho) is a hybrid between the yak and domestic cattle. The word dzo technically refers to a male hybrid, while a female is known as a "dzomo" or "zhom". In Mongolian it is called khainag (хайнаг). There is also the English language portmanteau term of yattle, a combination of the words yak and cattle, as well as yakow, a combination of the words yak and cow. Dzomo are fertile (or, fecund) while dzo are sterile. As they are a product of the hybrid genetic phenomenon of heterosis (hybrid vigor),
Which Witch? (novel) named Terrence Mugg and helps rescue him from the orphanage and a mean matron using an uncharacteristically dark spell to root the matron. Believing that Terrence's pet worm Rover is her familiar, an animal that is key to her working dark magic, she and Terrence agree to work together to win the competition. While the other witches' magic goes hilariously or horribly wrong when it is their turn in the competition, there is one problem Belladonna didn't count on. Madame Olympia, a truly evil enchantress joins the contest and is willing to do anything to make sure she will win