In honour of International Pet Day, we explore one of the most intriguing (and sniffle-inducing) ghost stories about the unique bond between us and our animal friends. Silent movie sex symbol, Rudolph Valentino, loved his Doberman, Kabar. The two were inseparable. When the heartthrob died unexpectedly at a young age, his beloved pooch went to incredible lengths to try to find him – including from beyond the grave. See photos of Valentino and Kabar.