Prince William likes to walk James Middleton’s dog, Ella, instead of playing “fiercely competitive” card games with the Middleton clan while off duty! “I know, too, that Ella gave him a good excuse to escape the fiercely competitive nature of the Middleton family, which emerged every time we played our favorite fast-paced card game, Racing Demon,” James wrote in his new book, Meet Ella: The Dog Who Saved My Life. James further added how the Prince of Wales is perfectly okay to be a “loser” when it comes to the aggressive card battles. “William would flinch at our ruthless determination to win …