It seems a little too late for Dotcom.  He is afraid of vacuum cleaner too.

I have his 3rd vaccine injected  yesterday  and  try to take him out for a walk in the evening.  He looked  excited with the sound of cars and autobikes.  But he socialized himself with other dogs and people very well.

I will try to take him to visit a dog show at Rosegarden next week.  To acquiant him with the ring and to see how people handle  their show dogs.

By the way, Bo is still jealous of Dotcom, even when leaving him alone with Dotcom, he won't play  but will steal the ball from Dotcom and running back to her cage.  And it will difficult to take the ball out of her territory now even for me.

I think the problem may come the fact that Bo is uncertain about her position in the Pack, I have tried to make Bo alpha female,  but Pingpong won't accept that ( see  http://www.bangkaew.org/index.php?name=PNphpBB2&file=viewtopic&t=2 ) and when Dotcom came running around with pingpong, she may feel that her position is even more unsure. 

Do you have any problems like this with many dogs around ?