To all those who can't remember a dog scene in the film, it comes at the end of the Toot Sweets factory scene when workers start blowing on their candy whistles.
'We want the dogs to run down the aisles through the audience and then across a kind of catwalk, if you will pardon the expression,' said Mr Rose.
'They will get an appearance fee and the owners will be paid for their time, trouble and expenses.'
In the queue, Ros Cramphorn, whose Irish wolfhound Bracken has already starred in Luther at the Olivier, said the going rate was £35 a show. But Bracken put on rather a wooden performance this time and was not asked back.
It was the same story for many of the pet idol hopefuls. 'He has never been able to do anything in particular but he can jump up and catch chocolates,' promised Estelle Phillips of her eight-year-old collie cross Pip.
Sadly, Pip performed like an England slip fielder on a particularly bad day and missed the lot.
'Spritzer! Sit!' bellowed Linda Sutcliffe, 52, as if sheer volume would trigger obedience in her mongrel. 'He is spoiled,' she apologised as the dog munched happily, instead, on a Bonio biscuit.
English mastiff Murphy sailed through the auditions with a mixture of beefcake and ham.
Asked to approach the judges, he leapt boldly but benevolently across their table to fix each one with a hang-dog eye. 'He likes to play, but normally he gets chased off by the other dogs,' said his owner Veena Daly, 34, from Sutton, Surrey.
The undoubted star of the show was Tas, a cross between border and bearded collies, who sat up and begged, rolled over and died and barked on command from owner Dave London, 37, from Basingstoke, Hampshire.
'We have seen some very good dogs and some very cute ones,' said Mr Bromley. 'We have got to do some head-scratching before the final selection.'
Scratching? Now that was something the hopefuls knew all about.
Chitty Chitty Bang Bang, starring Michael Ball, opens for previews on March 19 and has its premiere on April 16.
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