We have a 40lb lab/Doberman puppy, and she also goes into destructo-mode when handed a toy. The ONLY toy she hasn't torn parts off of is the traditional Kong. The fire house she ripped and ate the ball inside, Kong Squeez was in pieces in 10 minutes. She had a rope that lasted about a month, but as soon as she got it frayed and started pulling strings off I tossed it.
Other than that, she likes antlers and while she can put a couple of dents in the ends, she can't break off any pieces. As I'm not a hunter I was a little squeamish at first, but it's soooo nice to be able to give her something to chew without worrying about her.