Dogs are great optimists. They are also, by nature, empiricists. Experience has taught them that if they wait long enough, and with sufficient faith (manifest in a particular look which, while not resembling any human equivalent, nevertheless communicates itself to us across the species divide with absolute certainty) that which is believed in will come to pass: the ball will be thrown; the sausage will fall from the table. Dogs are also rarely disappointed. On the few occasions when the above does not work, something more interesting will inevitably turn up that then becomes of crucial importance. In this way, existential crisis is averted. The pigeon may not be caught, but look, there is another!
Of course, it may be that dogs have no intention of catching pigeons or, for that matter, car wheels. It is enough that the pigeon flies away, the car retreats. These too are results.
I spent several years of my childhood living in a bungalow. Down its center ran a hallway, at one end of which was the front door. This was panelled with two moderately sized sheets of patterned glass, one above, one below the letterbox. These panes, while offering privacy, nevertheless allowed us to see visitors approaching the door. Every morning one such visitor was the postman. You could set your watch by the regularity of his appearance, something our small and perky terrier knew only too well, and, as the time approached, Patch would skulk at the kitchen end of the corridor, with eager anticipation badly disguised as nonchalance. At the sound of the postman’s approaching steps the dog would fly down the hallway barking furiously and, a few feet before the door, leap forwards, hitting the glass with a satisfying clang. Equally satisfying would be the sound of the entire family shouting ‘Patch! Stop it!’ accompanied on the other side of the door by muttered curses occasionally augmented with a backwards stumble. It mattered not to Patch that the door prevented any chance of apprehending the intruder. Clearly the defensive manoeuvre had worked and the postman had, once again, been seen off. Happy with his work, our faithful guardian would then trot off and lie on the sofa.
However, over time the glass must have weakened so that, one day, the morning ritual did not culminate in the usual clang but with a great shattering explosion as the glass gave way and Patch, for the first time, found himself in actual physical contact with the postman. Perhaps contact is too strong a word? Bouncing off the postman’s legs Patch ended up seated on the lawn, surrounded by glass, while the postman ran up the garden path shouting ‘you want to watch that bloody dog’. It didn’t occur to Patch to chase the intruder because hitting the glass door had always worked, and now, with this obstacle removed, he found himself in unfamiliar territory. Instead, slightly bemused, he got up and found some very interesting things to sniff around the garden.