I love using chicken feet in cooking. These are the best by far I have used primarily because they are pre cut so you have little work to do before adding them to the stock. All other places I have ordered from don't removed the nails.
If you like chicken feet as much as I do -- collagen at its best -- finding anything better than Frankie's Free Range Meats chicken feet is next to impossible.
I can make a very nice chicken soup using these feet and other meat scraps I have laying around. Very thick and gelatinous after a 5 hour cook.