Nylabone's Dura Chew and Double action toys are a great buy.

These two dog bones are some of the new bones that I am recommending to people with dogs that are big chewers.  Nylabone is known for their durability for toys and these two are added to the list of my personal favorites.  I've even seen rottweilers have a hard time taking these down.  Both are made from a very hard plastic and usually for the most part don't break in to little pieces that can be swallowed.  Both come at a reasonable price they go for 13.99 to 19.99 retail but you can buy on at amazon buy clicking the pictures.  I received an email from a reader that says she loves these and they last a while her yellow lab and her pit bull love these and have had them over 2

years now.