Can you teach an invisible dog new tricks? A bizarre trend that started in Germany sees people taking a dog for a walk on a leash – but without the actual dog. Local trainer Barbara Gerlinger, admits it's "a little crazy," but is also dead serious about the concept. Stuttgart, Germany (dpa) – Taking a dog for a walk – without the dog? Believe it or not, an emerging pastime called "hobby dogging" is a new leisure activity for animal lovers in Germany who don't want the vet bills, hairy carpets, drooling or expensive vet fees. There is also no need to pick up the poo, deal with aggressive behaviour or barking when leaving your pet at home. As might be expected, it has been met with much head-shaking, scepticism and ridicule online. After all, the dog only exists in the walker's imagination.

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