If you only have one dog then buying cheap/on date stuff from the supermarket isn't that expensive. Surely you must have a local butcher: try going to them and explaining that you are trying to feed your dog naturally: butchers love people who buy meat etc. Ask if you can have some trimmings, chicken wings (many butchers just throw the chicken wings away) Lamb ribs are good too even for a tiny pup to chew on: they can't break off big enough bits to do them any harm and it keeps them happy for hours.
i have 3 terrier's and 3 pups im keeping a dog and bich back and all on james wellbelove