Just like a vigorous young colt in the world of racehorses, Jennifer and I need to take Henry and Ezra down to the beach and let them unleash their pent-up, volatile and potentially perilous power and energy . Here you can see Henry trotting alongside Jen, just before she pulls out the whistle and – in true Pavlovean-style – permits him to let loose and tear up and down the beach. It’s quite a sight to see.