Chicken feet are heated to a high temperature which makes them puffy (something to do with moisture expanding and other scientific stuff). The ones we stock are carefully sourced and the manufactures state no chemicals are used (unlike some cheaper ones usually made in US or China).
Their texture is a little chewier than the usual chicken feet which some dogs prefer.
Puffed Chicken Feet are loved by dogs of all ages.
These are a natural product and will vary in shape and size.