I just ordered a couple of boxes of these.  These are the kind I give my dogs (Nature's Variety).  I usually pay a bit more for these 3-lb boxes when I purchase straight from my distributor... so this is a good buy if anyone is interested.

http://www.amazon.com/Natures-Variety-Prairie-Roasted-48-oz/dp/B000FTSLBG/ref=sr_1_1?ie=UTF8&s=home-garden&qid=1199592703&sr=1-1

I try to take Izzy's away when it gets down to the end.. but he's always a hand full and gets very aggressive. So I try real hard to distract him and get it away or he gulps the end down. 

Thanks Nora!

I've been trying to find a source for the NV brand. I had heard that they don't stink. Like some other posters, I have given the Merrick brand and they don't seem to stink either. They are just a little bit pricey to give them to the dogs very frequently.