But Isis has her own timetable. Next morning, after the customary sniff review, she jumps out of the car. Her judgement is perfect. But perfect. Not a whisker touches the door frame.

Inspired by her success, Jo and I decide to train her to get into the car.

Are we mad? Don’t we realise that jumping into a car requires many more calculations than jumping out of one.

We conclude that she will sort it in her own time.