Chicken hearts have micronutrients in them that they don’t add back to dog food that would definitely be beneficial to her. Feeding them raw is best, but lightly cooking is OK. If you can handle raw, just spread them out on a cookie sheet and freeze so they are frozen seperately, then throw them in a bag in the freezer and give her one a day. If you really need to cook them, boil water and lower them in in a collander or something that you can fish them out quick with, and cook just until the surface changes color then remove. Freeze seperately on a cookie sheet.
