A cull might be kinder on a natural level than what happens in some areas. Someone I know moved to the country and one day they saw a fox taking their dog's food. They were surprised as in the country you rarely seeing a fox. Then they noticed it had a square shaved patch on its abdomen, and they were told that 'humane' pest controllers in some cities are trapping foxes, spaying them and releasing them into the wild. Unfortunately town foxes don't know how to cope as they're used to living above ground rather than under it and scavenging rather than hunting, and if they can't breed they're not going to become part of a family group, so their lives are pretty miserable. I think there should be much tougher laws against leaving food waste lying around or feeding foxes (I've seen several people do that round here) as getting that right would make a difference. By the way, we do cull dogs. If they're abandoned by their owners and no one wants to take them in, they're usually put down - they don't get to roam the streets in packs.