There is heaps of sites regarding "barf" on the internet, allow plenty of time for browsing & have your printer ready for downloading any info. If you like books, there are plenty to buy with info that you are requiring. Give your dog a bone is one ( available off the net) raw meaty bones is another & if you are lucky & enjoy browsing through s/hand bookshops you can pick up the complete herbal handbook for the dog & cat by Juliette de Bairacli Levy (this book pre-dates the first 2 by almost 50 yrs)Another is Natural Health for dog's & cat's by Dr Pitcairn ( a U.S.A publication) Hope this gives you some direction to go in