I bought a package of them from Walmart to see if my boys liked them. You have to find the "special" meats in the meat section. They cary tubs of chicken livers, turkey necks, beef tongue, beef heart, and all sorts of things, but the best place to get them though is from a butcher. We just recently found a butcher who has a price list for "dog food". They sell hearts, livers, and all the other goodies. The manager that I spoke with told me that upon request, she can get just about anything for our boys. My advice would be to find a good butcher and talk to them about buying/ordering feet from them.