Marrow bones are fabulous for making nutritious, tasty bone broth.  Venison is wonderful for those dogs with a sensitive stomach.  
Chewing on bones provides great benefits, as not only does it help to keep teeth clean, it is a satisfying meal that helps to relax and keep your dog happy. 
Venison is a great source of B vitamins and minerals such as zinc, phosphorous, and iron, to help maintain your dog's energy levels.  Venison meat is a good option for dogs that have food sensitivities or allergies.