I save the heart and liver out of all the birds I shoot and give them raw as treats to my dogs. I have also taken the heart and liver from deer and given it to them raw as treats. One time I made "Heart Snacks" by slicing and dehydrating a deer heart. Packaged it up and take them along while out hunting to give the dogs a little boost throughout the day. Also, when I'm butchering (deer, elk, beef, etc.) I save pretty much any scrap that would otherwise go in the trash and then grind it up like hamburger and put it in the freezer. I take a package out of the freezer and use it to supplement their dry food in the morning. My buddy has one of those jerky blaster guns and we have used my "dog" burger to make dehydrated snack sticks that we take to give our pointer during our hunts. So I pretty much save everything that I'm not going to eat and give it to my dogs. With the way dog food prices are going up, I've been considering buying scrap red meat and switching my dogs to 100% or at least 50% raw meat.