By Henry Moore A vet has issued an urgent warning following the rise of a viral TikTok trend that sees pet owners throwing lemon slices in their dogs’ mouths. The #DogVSLemon trend, which has amassed a staggering 20.1 million views on the social media platform, risks putting dogs in serious danger, Dr. Anna Foreman of Everypaw Pet Insurance has warned. One video, with over 16 million views, pictures a pup in clear discomfort after its owner throws the sour fruit into its mouth. And this rise in popularity has coincided with a concerning 65% increase in online searches for “dogs eating lemons.”…