I have heard that if you have a digging breed, take the "if you can't beat
'em, join 'em" approach.

That's what we did with Natasha, she has an area in the yard where she can dig
at will. I have a sign I put out if I have a tour coming through with a cute
story about "Natasha's digging garden", it's good for laughs and most people
understand. It keeps her out of my beds and from pulling plants from the pond.
We also made the pond accessible for her because there is absolutely no keeping
her out. I honestly don't think digging or swimming could be beaten out of her
lol. She is a Jack Russell mix which adds to her eccentricities.
Colleen
Zone 5 CT