Most of us have at least once received the well-intended advice to never give chicken bones to a dog. No matter how often repeated, this advice is only partially correct. It is true that the bones of cooked, boiled or fried chicken should not be given to a dog. The high cooking temperatures turn chicken bones into hard, glass like structures, which breaks into sharp and pointy splinters if dogs chew on them. These splinters can cause serious injuries.
Raw or dehydrated (dried) chicken bones, are both considered safe. In contrast to cooked chicken bones, their texture is rather soft and brittle. When chewed, they will crush, but not break into pointy objects. They are fully digestible for dogs.
Besides some tiny bones, chicken feet mostly consist of skin, connective tissue and cartilage. This is what makes them easily digestible. This also includes their nails. If you feel uncomfortable about them, just clip them off.