Following our story about a cheeky Jack Russell stealing more than 100 tennis balls, we asked KentOnline readers to send us pictures of their naughty pets. We were overwhelmed with hundreds of examples of mischievous dogs, cats and even sheep getting up to no good. One unimpressed owner, Alanna Wilton, filmed the moment her moggie Boris got stuck in a McDonald’s Happy Meal box. It meant the cat was the prime suspect after all the fast food disappeared. Another of those included in our list is a moggie known as Mary Five Bellies. She escaped the garden one night, managed to get on a neighbour’s…