Being omnivores that will eat whatever is available, foxes will hunt, kill and eat a wide variety of small mammals, including squirrels. A fox hunts by stalking its prey and then, after getting as close as possible, will attempt to run it down.
Because foxes possess excellent hearing, they can pinpoint the location of small mammals digging or burrowing underground. When they know they are above their prey, they will dig it up. Foxes usually hunt at night, dawn or sunset and will sometimes attack and kill pet dogs or cats. They hunt for food year round and do not hibernate during the winter.