I wanted to bring this incident from Fairfax County Police Department News Fox Bites Woman Several Times, Later Attacks House Cat; Animal Protection Police Collect Animal for Testing to your attention as we have numerous foxes in our community. I have seen them out during the day, as have other residents.
Normally, healthy foxes will avoid people. If you see a fox behaving in a strange manner, such as circling, staggering, drooling, or acting aggressive in any way, get inside somewhere safe, and please call 703-691-2131, and ask for Animal Control to report the problem. Try to be specific as to the location of the animal.
Do not under any circumstances try to approach or trap the animal. Be aware of your surroundings day and night, and keep small pets inside whenever possible.