I have two dogs and neither have been big fans of chewing. I think because when they were pups to even a few years old I discouraged them from chewing furniture and stuff around the house.
For fetching i've always used a field hockey ball. It is like an oversized tennis ball but hard solid rubber with no covering. It doesn't really bounce either. My GSD loves them and they are too large to swallow.
"The greatness of a nation and its moral progress can be judged by the way its animals are treated."
- Mahatma Gandhi