How is Levi Johnston preparing for his Playgirl photo shoot coming next month? According to Johnston's physical trainer, Bristol Palin's ex is killing his own food. "Moose meat is very good for you, high in protein and very lean," the trainer told People magazine. "He's an avid hunter, so he has his own." Johnston is hitting the gym six days a week, three hours a day. "I know that's something he wants to do and we're having fun training," the trainer added. "We're looking forward to revealing all his hard work!"