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Look like there is no definitive answer. It would largely depend, I guess, on whether you include dogs in the generic 'animals'. At the end of the day, commonsense is the order of the day, I think, and the dog really isn't too fussed about which side she walks, although I always put myself between the dog and the traffic, just as I would a child. As OG says, I'm less likely to swing myself out into the traffic than my dog.
Cheers all.