I know I've ground hundreds and hundreds of pounds of game with pork butt, pork belly or fatback and eaten it fresh, cured and after having been frozen for up to several years after in probably 100 different batches. It is always excellent in burgers, fresh sausages, snack sticks or cured sausages. I don't know where your problem came from, nor do I doubt that the meat sucked. I'm a picky mutherfucker about my food and it has to be perfect. There is no way that good quality pork can negatively affect good quality game.