NEED HELP - Digging Dog - What's Best Way To Stop?

OCDart,
We adopted a 9 week old Husky last week. It's a male, and he likes to dig too. My kids don't play in their sandbox anymore, so I put the dog in there and let him dig to his hearts content! It seems that he gets it out of his system in the soft sand, and doesn't really go for the planting beds anymore. I mean, he will if I don't stop him, but I just direct him to the sandbox and let him go to town. The sand is clean too so no muddy paws coming in the house even if it's raining.
Might be worthwhile to build one. The one I made for the kids is 8ft by 4ft with 2X8 sides, and a plywood bottom. Filled it up several years ago and it's still doing fine even through the harsh New England winters.
Good Luck with your Husky!

George