Fox Den Habits
Foxes generally do not use the same den every year.
Why They Move:
Parasites and disease: Dens can become unhealthy.
Predator avoidance: Familiar dens are easier for predators to locate.
Resources: Prey availability and terrain change.
Territoriality: Other foxes may take over a known den.
Exceptions
If suitable dens are scarce, a fox may reuse one, especially if it proved successful in the past. Some dens may hold generational significance.
Most often, foxes relocate annually to protect the health and safety of their young.