I'm not sure if I went about it the correct way, BUT I tend to use those experiences as time for a training lesson. My Isis, who is 5 months old goes crazy when she sees other dogs and people. What I do is put her training collar on and put her in various positions. Using the distraction to my advantage while training. For example, while in the neighborhood walking if cars pass by, people are walking their dogs, etc. I put her in her sit of down position. Amazingly enough, she stays. Now when I am able to do it with a regular leash on, I'll be quite happy. In short, use the distraction to your advantage. Not only does it teach your boxer manners, but it teaches them to obey commands.