Back in 2004 the teeth on some of the older dog's had the odd groove worn in the canine when they where unlucky enough to go jaw to jaw. .with owld charlie..them day's are long gone now though mate..just bunnies for me these day's..
. Not being a terrierman, the only foxes I saw despatched on a regular basis, which was in the 80's and 90's, were by a 1st x deer/grey, best I ever seen, and a deer/grey x collie/grey, another great dog, game over for the foxes in seconds. But like you say, in the past now.