What do foxes eat?
Foxes are omnivorous hunters, and will generally eat anything easily available and easy enough to catch. This includes small mammals, birds, as well as large insects. They consume meat mainly in wintertime, whereas in spring, summer and autumn they primarily consume fruit, berries and nuts.

How often do foxes eat?
they hunt and eat mainly in the early hours before sunrise ,as well as late at night

How much do foxes eat at a time?
require 500 grams of food per day

For further information: http://animals.nationalgeographic.com/animals/mammals/red-fox/