Mirka, I understand what you said, but i think that the pictures of bonitace that you put on don't say nothing: even dogs with good character (but not trained for this) in this situation can put the tail under the belly.
We saw this at the last bonitace in Italy : absolutely friendly and self confident dogs (especially females) in this new situation put the tail sometimes down. Don't forget that for many of these dogs the most similar situation that they lived was with...the scary veterinary !!!
