I buy these for Gizmo, and they take a long time for him plus he loves them :-)
N-Bone , I also buy the vanilla mint dental sticks that also last a long time. Their products are all natural, and they have a ton of different catagories of chews depending on your fur babies needs :-)
He's really funny when he gets any of them, he will hide them really frantically over and over between chewing them, because I think he thinks he must have been given them by accident because they taste so good to him LOL. He won't even touch the nylabones at all, but any of the chews from this company he goes crazy over. With the chew rings, I will usually break them into 4 pieces, and give him a piece every couple days, or alternate a dental chew on one day a week. My vet said his teeth are so clean with no tartar or anything, so apparently the dental chews are working for keeping his teeth real clean. The only thing is their paws and face get a little messy as they break them down, but they last a long time, and I just use a warm moist wash cloth to wash his face and paws once he's done :-)