Mike Tyson has been filmed showing Muhammad Ali's grandson his beloved collection of pigeons.Boxing legend Iron Mike was friends with Ali during his career in the sport, and has now been seen spending time with his grandson Nico Ali Walsh. Nico, 21, has already laced up the gloves and stepped into a professional boxing ring on five occasions.His record currently stands at 5-0-0 and he recently recorded a stunning one-punch knockout victory over Alejandro Ibarra at the MGM Grand in Las Vegas last month. But now it seems like he's enjoying some downtime, and has been snapped visiting Tyson.