[JoeyP]

When Yorkies become afraid or excited or alarmed

.... They Tell you
some how your guy has associated children with alarm
possibly some children were rough with him in the past
or their running around scares him
or he gets excited by their frenetic actions

You can head this off at the pass by enlisting some neighborhood kids or children of some relatives
All kids love helping train dogs
tell the kids to come into a room with your dog
He might bark and run away
But the children are to come in and stand still and not look at your dog
Give them a nice smelly treat to hold in their hand
A Piece of hotdog is always good for this
Let your dog come to them
and they are not to acknowledge him or give him the treat until he stops barking and is actively trying to get at the treat

When he does You come over and say GOOD BOY and then they can give him the treat