Does a physically intense walk with lots of play – tiring the dog out – bring them to low arousal? Absolutely not - it actually pushes them even higher.

August 2010. Over a hundred metres down, in the dark water of Rombakken fjord - the wreck of a Polish destroyer that sank in three minutes.

He disappeared into the bushes and came back… transformed. Later I found out why - a dead beaver, and the smell that stayed with us for days. Turns out, that’s what happiness can look like to a dog.