Hi the book BARF diet for dogs and cats explains the theory and practical very explicitly. One can have absolute faith in what is written about this somewhat contraversal way of feeding pets. The difficulty would be if the dog/cat would not eat bones to buy a bone grinder is rather expensive. It is a very important part of the pets diet that it should consume the bones and meat thereon. My dog enjoys the bones, chicken and pork ribs, but dislikes the raw veg., even if it is put through a food processor. However, I am working on it.