http://www.doggysnackshack.com/info2.cfm?info_id=66492These offer a lot different things that your dog could possibly eat.
They're not the cheapest but it is good and natural quality, it contains no salt or preservatives. Some in the supermarket have salt (the most popular brand or PAH).
Mine don't always manage bones so I give them shredded hide sticks or things like Bonio. Would your dog manage detastix.
Hope it offers some help as i don't know much about the condition.
Could you make your own dehydrated meats. You can pick up a good dehydrator fairly cheap and you could have a batch made in24/36 hrs. Saves loads of money.