Fox dens (earths) are used for cubbing and the welfare of fox cubs depends on the security and undisturbed nature of their birth site.
Fox cubs disturbed in the first weeks of life risk cold exposure and separation from the vixen when she relocates the litter. Humane management of foxes near human habitation avoids disturbing active earths during the cubbing season. Proofing access before cubs are born is the welfare-positive approach.