rabid?
This weekend, somebody in the Washington, DC, suburbs was walking his dog when they encountered a fox, which charged them. They prudently ran like hell, and got away when the fox was diverted by the man's fallen hat. The local animal control people suppose that the fox was rabid.
Despite the Anglophilia that prevails in some circles hereabouts, fox hunting has never been much of a presence here, and is less so as the suburbs have expanded.