When I lived in south London we had a flood meadow at the back of our house ..I would say that this meadow was a couple of acres .There were several gangs of foxes living there and we used to feed them.They will eat ,dog food,cat food ,any left over table scraps and the turkey legs which I used to cook specially for them.I know you shouldn't feed them or encourage them but they are delightful to watch and become very bold and actually have a built in clock as to feeding time !
Here is my pet fox who I used to feed..probably long gone by now...
http://i12.tinypic.com/4beius4.jpg
Since moving to a more rural area albeit a small town and surrounded by countryside I have not seen one fox in the three years we have been here ..,..are they trying to tell us something?