Dont know if the scents will help to get the earths used again, but when I make an artificial, I always put a dead cat in the end. Foxes love em for some reason, and they seem to get used much quicker. I have used a foxes coat soaked in a sealed bucket, with a wee vent in the top for snaring, and it certainly draws in any territorial foxes in the area. As far as fox scent sprays etc go ive only ever used them for training the dogs on, with hunting/tracking.
Sorry if thats not much help, but its my pennorth worth.!!
DnN
where can we get our hands on a dead cat then ?
you often se