Joey isn't much of a digger, but I used to have a Husky who was determined to reach China through his daily excavation!
The one thing that helped was this: Put a piece of his/her POOP in each of his/her holes. It works like a charm for them no longer digging in the same spot; unfortunately, it doesn't prevent digging new holes. What I found, though, was that he eventually got tired of starting new holes, having his progress thwarted, and gave up.
As far as digging in the house, I'm no help. I used to have a ShihTzu (the 'dim bulb' that I've talked about) who would stand in my lap to dig like mad on my throat. Ouch!
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