Children enjoy 'where's waldo' as their favourite game for many years but now the internet goes viral on 'where's Dog'.  Pandemic spread and lockdown has made people think crazy and social media is flooded with puzzles and optical illusions.  Recent hit is finding the hidden dog and people are uploading images of their dogs hiding in unnoticeable places in the Dogspotting society Facebook group.  Not only pet lovers but to all viewers this 'find the dog' challenge seem...