We have foxes and groundhogs (+bear, coyote, bobcat, and tourists) around here too. I think a full-grown groundhog would easily outweigh a fox and be too dangerous to go after when there's easier prey like rabbits and voles to get.
I once came across a fox den in a blackberry patch. Those fox must have been pretty regular from eating all those berries.
A shotgun is the quick fix around here, but probably not in Cherry Hill. Maybe the local police would be willing to do some target shooting one saturday.