Foxes are a pest and should be treated as such. However, I do not advocate the way they are killed. They should be culled in a more humane way, perhaps a gamekeeper with a rifle. I am not sure if that would be more humane, but there must be some way rather than tearing them apart. As for the poor cat, I feel really sorry for that. What would happen, I wonder, if the dogs attacked a child? This is highly possible if they will attack small animals.