My dog gets scared of bikes(standing or moving) and large vehicles. Her name is Emma, a 6 month old Golden Retriever. She is extremely playful and protective. We take her for regular walks - she isnt scared of any other dog that advances towards her - she maintains her cool temperament and balance, but all this is lost when there is a bike passing by her or even if she passes by a standing bike. It doesnt matter whether there is a human on that bike or no. She gets so scared, that she looses her balance in walking and its tough getting her back to the calm state. Please advise what should I do. For now, I ignore the fear she exhibits so as to not nurture that behavior, but it hasnt helped.