The fox is at the top of it's food chain and has never naturally been hunted. It's survival depends upon the availability of food in it's territory.

If too many fox cubs are born then there will be too much competition for food, some mouths will not be fed and therefore mean then population is controlled by nature and is self regulating.

Remove a fox from a territory and another one will quickly take it's place, eager for the newly available food.

Foxes use scent for their main communication. The big bushy tail (brush) helps to spread this around! Some hunts people have claimed that the fox does not seem worried by the fact that he is being chased. This is because the fox is generally a solitary animal and unlike a herd animal, has no one to call out to and raise the alarm. He is still communicating with scent which only helps to make it easier for the hounds to follow him.