I would say that your dog needs a few things to help you conquer her chewing habits:

1) Forget the cute fuzzy toys, buy only the very tough and durable rubber toys. For instance, KONG created an Ultra KONG that is much harder to destroy and is for the destructive chewer. There are also tire biter products. I would also not consider edible bones a "toy" - they can be eaten too fast!

2) Being a Golden/Heeler mix means she has a good deal of energy and immaculate intelligence. You need to keep her busy everyday to relay some of that chewing as she is probably do it out of boredom also. Try enrolling her in some obedience classes or taking up agility with her. A romp in the yard or quick walk will not be enough for her.

3) Crate her when your gone. It's not mean - its safe. What I always tell students is wouldn't you rather come home to a living dog with more energy or a dog that has choked on something? You can also crate her when you can't keep an eye on her. This way you will be able to redirect any negative behavior positively.

Good luck.