The dog was snoozing in her basket, trying to ignore the signs of the house waking up. As I walked into the kitchen I spotted a red fox ambling through the garden. Dog spotted it too and all hell broke loose. Dog sprints to door, heckles up and barking mad; door is unlocked, fox notices dog and pelts for the back fence. Fox runs up and over the fence, its tail a red flag just as it disappears down the other side; dog splats into the fence and has to slink back into the house hoping we didn’t notice. This, I told the children, is evolution at work.