A Little Bit On The Horse Heart Side: With the Game of Thrones DVDs and Blu-Rays set to come out March 6, THR has a sneak peek of the behind the scenes content. We find out that the horse heart that Emilia Clarke as Daenerys Targaryen scarfed down for multiple takes was pretty much a giant gummy bear (gummy horse hearts make great Valentine’s gifts). There’s a word to describe someone like Clarke: keeper.