I thought at one point that was no toy made that my dogs couldn't destroy, then I found Cuz toys. Some of them are deceptively simple, soft rubber, but the dogs love them...and what's better is they havn't so far destroyed one. They also would rather have a soft toy, but they just to rip it to shreds.
I know that if you can get a hold of some deer and elk horns are very good for dogs to chew on they do not splinter so their is little chance you dog would choke. Most pet stores sell antlers for dogs but make sure what ever you pick is big enough that your dog will not try and swallow it hole.