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This article states that a water buffalo–cow hybrid is impossible, but according to the Vietnamese Wikipedia, an infertile hybrid between a water buffalo and cow, called mẽo, is bred (with difficulty) in parts of northern Vietnam. The article is unsourced, but it's intriguing if true. – Minh Nguyễn (talk, contribs) 07:42, 5 December 2013 (UTC)