pig heart and cow heart are bigger than cow heart. According to the relevant information, a normal pig heart weighs more than a catty and a cow heart weighs 3-4 pounds. Niu Xin can nourish blood and nourish the heart, and treat forgetfulness and fright. Pig heart nourishes the heart and calms the nerves. The protein content of pig heart is twice that of pork, while the fat content is only ten times that of pork.