Kongs: Hard, hollow rubber. Are great filled with treats, peanut butter, cheese, etc. Are easily cleaned in the dishwasher. The black rubber is the most durable.
Natural Sterilzed Bones: Hard and hollow. Are great filled with treats, peanut butter, cheese, etc. Are easily cleaned in the dishwasher. Should be used under supervision with hard chewers or with dogs with delicate teeth. These can chip teeth if the dog is a heavy chewer.
Goodie Ships/planets: Hard rubber toys in which you can stick treats for the dog to work getting out. The black rubber is the most durable.
Rope Toys: Great chew and tug toys. Also good when soaked in water and put in the freezer. This helps teething puppies.
Buster Cubes or Roll-a-Treat Balls: Not chewable but can help prevent boredom by having the dog have to work to get the food out.
Nylabones: Good and safe for chewers but relatively boring for the dog. They can be made more interesting by soaking them in chicken broth.
Rawhides: Should be used under supervision. Large bones are recommended for the dog to gnaw on. Chipped rawhide and small pieces and sticks can get "gummed up" and dangerous if swallowed in large chunks.
Chew Hooves: Good when used under supervision. Dogs can break off large pieces that occasionally have sharp tips. These should be discarded when they become small.
Pig Ears: No real nutritional value. Quickly consumed and don't curb the need to chew. Very fattening to the dog.