My problem is that Pixie literally SCREAMS with excitement when seeing other dogs especially if they are running off leash..i think the problem is that she wants to run with them but i am not happy about letting her off in case i can't get her to come back and i'm afraid she would get injured being so small...It can be a bit embarrassing when people see this tiny 3lb yorkie making such a racket..she's not being aggressive though...i have no clue how to deal with her..