There are some on this forum who advocate doing nothing, even when the culprit is a fox. On the other hand i recommend that you make plans to enjoy juicy Thanksgiving groundhogs this holiday season. Yum Yum.
While groundhogs are vegetarians I would not go as far as saying that they are "strict" vegetarians.
Empty groundhog, woodchuck, or whistle pig burrows are favorite den locations for fox, coyote, raccoon, mink, skunk, and a whole hoist of other critters who all love to snack on succulent...