Wow! thanx for all the input! So far I think what might work is getting Shelby her own digging spot, maybe a little kids pool with some sand/dirt in it? I have to work 8-10 hours so keeping her in isn't really an option. Sooo, we're gonna have to compromise since I can't catch her in the act, little sneak!
Thanks again, Shelby's Mom, any other input sure is welcome!