Nylabone makes durable and flexible chew bones. The durable bones are for adult dogs and appear to be opaque. The flexible bones are for puppies and are more translucent. The durable adult dog chew comes in several flavors:
The double action chew is popular. I think the dogs like the textured surface. The large size is great for big dogs.
Some additional textured dog chews:
Although not a textured surface, the Galileo is also popular and very durable. Also quite good for large dogs.
If you have a small dog, some of the chews are available in pink or blue:
Premier Pet Products makes a rather ingenious toy designed to encourage puppies and dogs to chew toys instead of furniture. It comes in two varieties and many sizes. I have had more luck with the bouncy ball as opposed to the bristle bone. The two rings on each toy are edible. You can purchase replacements as the puppy eats the rings.
Bouncy Bone:
Bristle Bone:
Small Refills:
Medium and Large Refills:
Happy chewing!
See also Food Toys. Some food toys are also chewable.