Sometimes parents have to say no to their kids.  That was the case for Regina Mayer's parents when they told her daughter they couldn't buy her a horse.  So what did this German teenager do?  Rode her cow Luna.  Of course!

Hours of training, and tons of treats, cajoling and caresses later, the results are impressive: not only do the two regularly go on long rides through the southern German countryside, they do jumps over a makeshift hurdle of beer crates and painted logs.

"She thinks she's a horse," the golden-haired Mayer joked on a recent sunny afternoon as she sat atop the impassive brown-and-white, grass-munching cow.

It all started about two years ago, shortly after Luna was born on the Mayers' sprawling farm in the hamlet of Laufen, just minutes from the Austrian border.

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