great story Malcolm ,my first guide dog was walking me through boots and I heard a child say that doggy has my loll .I somehow knew it was my dog ,like you they can move there head without waggling there body if they have to the child was in a pram just at the same age as my daughter and because she got away with her she thought it was normal for her to do it .I ended up giving her a pound for another which I didn't think the mother would take also my dog I have now will not go near anyone who has food .