Lucy and Flora weren't too bad, although now they get into anything that may have once contained food, or is able to contain food.
In the puppy stage, Flora pulled the insoles out of a few shoes and chewed them up, but never chewed the shoes themselves. Easily fixed. She also ate part of the tongue of my Sorel boots for below-zero weather, annoying, but I still wear them.
The most expensive things they ate were not the item that they ate, it was the vet bills racked up trying to cure them from what they ate. One summer Flora managed to squeeze into our compost pile, and slice open 4 inches of skin, to the muscle/bones along her ribs. Not a pleasant experience, or cheap either, since she needed anesthesia to be stiched. The next month, Lucy found a corn cob that hadn't quite made it onto the compost pile that had grown a nastly mold. At least we think that's what happened. Anyway, she staggered up to us one Sunday afternoon, drowling like a facet. So we rushed her to the emergency vet clinic, and she stayed there for a day and a half.
So now I say we have the most expensive compost in the world!
I'm just glad the girls are still with us after those "adventures."