That is a chicken foot. Chicken feet can be an important part of a dogs diet since they contain a lot of calcium and are easy to chew. If you can get chicken feet in the area you live in it is much better to start your puppy on this type of chew than on some rubber ball that has to be purchased from a pet store.
If you are interested in learning more about how to feed your puppy correctly, there are many sources out there that will tell you about feeding a raw diet. I have an article at: https://pethelpful.com/dogs/best-puppy-food-raw-do... that will give you details on the ingredients you need to add to a puppy´s diet to stay healthy. If someone has convinced you that this is going to cost too much for your puppy, I also have an article on raw ingredients that are not expensive at:
Go out and get him some chicken feet today!