I watched a documentary on the Taiga Forest in Finland last night and they had the red fox on there. Apparently the most prolific species as far as spread across the world, second behind humans. I didn't know that.
They are cute, but the problem is here is that they were introduced by the British for their fox hunts back in the day. They dominated and kill so much of the native fauna, most of which is unique to Australia alone. It's an issue. Also, for every fox in the country they are attributed the amount of $4,000 annually as far as cost to the sheep industry. They attack the lambs, eat out their soft parts and leave them to do. That's $4,000 for every single fox in the country, and there's a lot. So, they need to be eradicated.
I know you understand, as per your comment about the deer. It's just part of modern life I guess. We bring these species in and they proliferate. Humans most often upset the balance of the natural order and then spend time and effort controlling their mistakes.