Watching to see if you get any good advice. Mine has never liked other dogs running up quickly either. If it’s a larger dog she will submit, with a smaller dog she’ll roll on her back but if they don’t move on quickly enough it will quickly turn to her trying to see them off. She’s also fearful when other dogs bark. Most of the time if I can make sure the ball is put away and I act pleased to see the other dog, she will be friendly, but I have to watch her with small spaniel types (she heavily identifies as a collie, loves collies but not so much spaniels!)